The Wiseco RCS39040 Tapered Ring Compressor Sleeve provides a precision solution for installing pistons without damaging high-performance ring sets. Forged in-house in the USA, these sleeves feature a smooth internal radius that tapers down to the specific bore size, ensuring rings are compressed evenly and safely as they enter the cylinder block.

This sleeve is engineered for long-term durability in professional engine building environments. The hard-anodized finish is paired with a Teflon coating to minimize friction, preventing ring hang-ups and protecting delicate face coatings on oil rings and compression rings alike.

• Manufacturer Part Number: RCS39040
• Target Bore Size: 3.903in - 3.905in
• Construction: Forged aluminum, hard-anodized and Teflon coated
• Low-Friction Design: Smooth radius taper for even ring compression
• Identification: Laser-marked with size for quick bench recognition

Streamline your engine assembly and protect your piston rings with the Wiseco 3.800in Bore Ring Compressor Sleeve (RCS38000). Forged in-house in the USA, this precision-machined tool provides a superior alternative to generic adjustable band compressors, ensuring even compression across the entire ring circumference.

Each sleeve features a smooth internal radius that tapers down to the exact 3.800-inch bore size, allowing the piston and ring pack to slide into the cylinder without catching or snagging. This is particularly critical for the delicate, high-performance oil rings found in modern racing applications. The sleeve is hard-anodized and Teflon-coated to minimize friction and prevent surface wear over years of shop use.

• Bore Size: 3.800 inch
• Material: Forged aluminum construction
• Finish: Hard-anodized and Teflon-coated for low-friction operation
• Tapered design ensures smooth ring compression and installation
• Permanent laser-marked sizing for quick identification
• Manufacturer Part Number: RCS38000

Ensure a precise, damage-free engine assembly with the Wiseco RCS10000 piston ring compressor sleeve. Designed for professional engine builders, this tool simplifies the installation of high-performance oil rings and compression rings by providing a smooth, even transition into the cylinder bore.

Each sleeve is machined with a specific radius that tapers down to the exact 100.0mm bore size, preventing ring hang-ups or breakage during the piston installation process. The hard-anodized aluminum construction is finished with a Teflon coating to minimize friction and provide long-term wear resistance in a shop environment.

• Bore Size: 100.0mm
• Material: Hard-Anodized Aluminum
• Coating: Teflon-coated for low friction and smooth compression
• Design: Tapered bore with a smooth radius for easy ring entry
• Identification: Laser-marked with bore size for quick selection
• Manufacturer Part Number: RCS10000

The Wiseco RCS09950 Piston Ring Compressor Sleeve is a precision engine-building tool designed to ensure the safe and efficient installation of 99.5mm pistons. Unlike generic adjustable compressors, this fixed-diameter sleeve features a smooth internal radius that tapers down to the exact bore size, compressing rings evenly and preventing the breakage often associated with high-tension performance ring sets.

Constructed for professional use, the sleeve is hard-anodized and Teflon-coated to minimize friction and provide exceptional wear resistance. This combination allows the piston and ring assembly to slide into the cylinder block with minimal resistance, protecting both the ring landings and the cylinder walls from damage during assembly.

• Bore Size: 99.5mm
• Material: Hard-anodized aluminum for long-term durability
• Finish: Low-friction Teflon coating for smooth piston entry
• Design: Precisely tapered internal bore for even ring compression
• Identification: Laser-marked with size for quick tool identification
• Manufacturer Part Number: RCS09950

The Wiseco RCS09900 is a professional-grade 99mm piston ring compressor sleeve engineered to ensure precise, damage-free piston installation. Designed for high-performance engine assembly, this tool features a smooth internal radius that tapers down to the specific 99mm bore size, compressing rings evenly and smoothly as the piston passes through the sleeve into the cylinder block.

To handle the demands of frequent engine builds, Wiseco constructs these sleeves with a black hard-anodized finish and a Teflon coating. This combination significantly reduces friction and provides excellent wear resistance, preventing the scuffing of piston skirts or delicate ring faces. This dedicated sleeve is especially effective for installing high-tension oil rings which can be difficult to seat with universal tools.

• Specific Fitment: 99mm bore size
• Construction: Hard-anodized aluminum for durability
• Coating: Teflon-coated for low friction and smooth ring compression
• Design: Tapered bore with a smooth entry radius
• Identification: Laser-marked with size for quick verification
• Manufacturer Part Number: RCS09900

The Wiseco RCS09800 is a precision-engineered 98.0mm piston ring compressor sleeve designed to streamline engine assembly and protect critical components. This professional-grade tool features a smooth internal radius that tapers down to the exact bore size, ensuring piston rings are compressed evenly and smoothly as the piston is seated into the cylinder block.

• Specific Fitment: 98.0mm bore size
• Construction: Hard-anodized aluminum for maximum wear resistance
• Low-Friction Coating: Teflon-coated interior ensures smooth piston travel and prevents ring snagging
• Precision Taper: Smooth radial design eases the installation of high-performance oil rings
• Identification: Laser-marked with size indication for quick tool selection
• Manufacturer Part Number: RCS09800

By providing a consistent, 360-degree compression, this sleeve significantly reduces the risk of breaking rings or damaging the piston during high-performance engine rebuilds. It is an essential tool for technicians requiring repeatable accuracy and protection for delicate ring sets.

The Wiseco 97mm Bore Ring Compressor Sleeve (RCS09700) is a precision-engineered tool designed to streamline engine assembly and protect your high-performance piston rings during installation. This fixed-bore sleeve utilizes a smooth internal radius that tapers down to a precise 97mm diameter, ensuring rings are compressed evenly and safely to prevent damage or snagging on the cylinder deck.

• Low Friction Finish: Hard-anodized and Teflon-coated for superior wear resistance and a low-friction surface that prevents ring binding.
• Precision Taper: Smooth internal radius allows for effortless piston installation, particularly for fragile high-performance oil rings.
• Professional Grade: Durable construction designed for repeated use in high-performance engine rebuilds.
• Easy Identification: Laser-marked with the 97mm size for quick reference in the shop.
• Manufacturer Part Number: RCS09700

The Wiseco RCS09550 Tapered Piston Ring Compressor Sleeve is a precision tool engineered for engine builders who require a reliable, damage-free method for installing high-performance pistons into 95.50mm bores. Unlike generic band-style compressors, this fixed-diameter sleeve features a smooth internal radius that gradually and evenly compresses rings as the piston is pushed through, significantly reducing the risk of breaking or distorting thin oil rings.

• Precision Fit: Specifically machined for 95.50mm bore sizes to ensure perfect ring alignment.
• Low Friction Finish: Hard-anodized and Teflon-coated construction provides superior wear resistance and allows pistons to slide through with minimal resistance.
• Tapered Design: The smooth internal taper compresses rings smoothly without snagging or catching.
• Clear Identification: Laser-marked with the exact bore size for fast identification in professional shop environments.
• Manufacturer Part Number: RCS09550

The Wiseco RCS09500 is a precision-engineered 95.00mm tapered piston ring compressor sleeve designed for professional engine assembly. Unlike adjustable pliers-style tools, this sleeve features a fixed, machined taper with a smooth lead-in radius that compresses rings evenly and gradually as the piston moves through the bore. This design significantly reduces the risk of breaking or snagging high-performance oil rings during installation.

Built for durability and ease of use, each sleeve is manufactured from high-grade material with a hard-anodized finish and a Teflon coating. This combination ensures low-friction operation and superior wear resistance for repeated use. The sleeve is permanently laser-marked with the size for quick identification in the shop.

• Manufacturer Part Number: RCS09500
• Bore Diameter: 95.00mm
• Material: Hard-anodized aluminum
• Coating: Teflon-coated for low friction and surface protection
• Features: Smooth entry radius and tapered bore for precise ring compression
• Identification: Laser-marked size indication

Ensure a precise and damage-free engine assembly with the Wiseco 94.0mm Piston Ring Compressor Sleeve (MPN: RCS09400). Engineered for professional engine builders and performance enthusiasts, this sleeve features a precision-machined internal radius that tapers down to the exact 94.0mm bore size, allowing the piston and ring assembly to glide into the cylinder without snagging.

Built to withstand the rigors of frequent use, the sleeve is hard-anodized and Teflon-coated. This combination provides a low-friction surface that prevents ring damage and offers superior wear resistance over time. It is especially effective at safely compressing thin, high-performance oil rings that are easily damaged by traditional universal-style pliers or band compressors.

• Bore Size: 94.0mm
• Material: Hard-anodized aluminum with Teflon coating for low friction
• Tapered Design: Smooth internal radius for even ring compression
• Identification: Laser-marked with size for quick tool selection
• Compatibility: Engineered for specific 94.0mm bore applications
• Manufacturer Part Number: RCS09400

The Wiseco RCS09300 Piston Ring Compressor Sleeve is a professional-grade assembly tool designed to streamline your engine rebuild. Engineered with a smooth internal radius that tapers down to the precise 93.0mm bore size, this sleeve allows for the seamless installation of high-performance pistons and delicate oil rings without the risk of snagging or damage.

• Hard-anodized and Teflon-coated construction provides low friction and superior wear resistance for repeated shop use.
• Tapered design compresses rings smoothly and evenly into the cylinder bore.
• Greatly reduces the difficulty of seating high-tension high-performance ring sets.
• Laser-marked with the 93.0mm size indication for fast identification on the workbench.
• Manufacturer Part Number: RCS09300.

The Wiseco RCS09200 Piston Ring Compressor Sleeve is a professional-grade tool designed for engine builders who demand precision and reliability during the assembly process. Specifically engineered for a 92.0mm bore, this sleeve utilizes a smooth internal radius that tapers down to the exact bore size, ensuring piston rings are compressed evenly and safely into the cylinder block.

• Hard-anodized and Teflon coated for low friction, providing superior wear resistance and a smooth glide.
• Precision taper design eliminates the difficulty of installing high-performance oil rings.
• Ensures even ring compression to prevent damage to the ring lands or the rings themselves.
• Laser-marked with size identification for easy organization and quick identification in the shop.

Specifications:

• Bore Size: 92.0mm
• Material: Aluminum
• Finish: Black Hard-Anodized with Teflon Coating
• Manufacturer Part Number: RCS09200

Ensure a precise and damage-free piston installation with the Wiseco RCS09100 Tapered Ring Compressor Sleeve. Engineered for a 91.0mm bore, this specialty tool features a smooth internal radius that tapers down to the exact bore size, allowing for even compression of the piston rings as the assembly slides into the cylinder. This design significantly reduces the risk of breaking or snagging high-performance oil rings during a rebuild.

• Precision-machined with a 91.0mm bore diameter
• Hard-anodized and Teflon-coated for low friction and prolonged wear resistance
• Sleeves feature a smooth radius that tapers down to the specific bore size
• Greatly reduces difficulty of installing high-performance oil rings
• Compresses the piston rings smoothly and evenly to prevent ring breakage
• Laser-marked with size indication for easy identification in your toolbox
• Manufacturer Part Number: RCS09100

The Wiseco 90.5mm Bore Ring Compressor Sleeve (RCS09050) is a precision-engineered tool designed to streamline the engine assembly process. Unlike adjustable band-style compressors, this fixed-diameter sleeve ensures perfectly even compression of the piston rings for a seamless transition into the cylinder block, protecting both the rings and the piston skirts from damage.

Each sleeve is hard-anodized and Teflon-coated to provide a low-friction surface and exceptional wear resistance. The interior features a smooth radius that tapers down to the specific 90.5mm bore size, which is critical when installing thin, high-performance oil ring sets that are prone to catching on standard tools. For ease of use in a busy shop environment, the sleeve is laser-marked with the bore size for instant identification.

• Bore Size: 90.5mm
• Finish: Hard-anodized and Teflon-coated for low friction
• Design: Smooth radius taper for even ring compression
• Identification: Laser-marked size indication
• Manufacturer Part Number: RCS09050

The Wiseco RCS09000 is a precision-engineered engine assembly tool designed to ensure safe and efficient piston installation. This 90.0mm compressor sleeve features a smooth internal radius that tapers down to the exact bore size, compressing the rings evenly as the piston slides into the cylinder. This design significantly reduces the risk of breaking or distorting high-performance rings, particularly delicate multi-piece oil rings.

Engineered for professional shop use and performance engine builders, the sleeve is hard-anodized and Teflon-coated to provide a low-friction surface and excellent wear resistance. The laser-marked size indication ensures quick identification in a busy workspace, making it a reliable addition to any engine building toolkit.

• Specific Bore Size: 90.0mm
• Material: Hard-anodized aluminum for prolonged durability
• Finish: Teflon-coated for low friction and smooth ring compression
• Profile: Smooth radius taper for uniform ring seating
• Identification: Laser-etched size marking for easy shop visibility
• Manufacturer Part Number: RCS09000

Streamline your engine assembly and protect your investment with the Wiseco RCS08950 Piston Ring Compressor Sleeve. This precision-engineered tool is designed to compress piston rings smoothly and evenly, eliminating the risk of damage or breakage during installation. It features a smooth internal radius that tapers specifically to an 89.5mm bore, allowing the piston and ring assembly to slide into the cylinder with minimal resistance.

Built for the rigors of the machine shop and the home garage alike, the sleeve is hard-anodized and Teflon-coated. This combination significantly reduces friction and provides superior wear resistance for a long service life. The exterior is laser-marked with the bore size for quick identification in your toolbox.

• Bore Size: 89.5mm
• Material: Hard-anodized aluminum with Teflon coating
• Smooth radius taper for seamless ring compression
• Reduces difficulty when installing high-performance oil rings
• Manufacturer Part Number: RCS08950

Precision-engineered for professional engine assembly, the Wiseco RCS08850 Piston Ring Compressor Sleeve provides a smooth, reliable way to install pistons into an 88.5mm bore. Unlike adjustable pliers-style compressors, this fixed-diameter sleeve features a precise internal taper that ensures rings are compressed evenly and stay seated as the piston enters the cylinder, significantly reducing the risk of broken or misaligned rings.

Constructed from high-grade materials, the sleeve is hard-anodized and Teflon-coated to minimize friction and provide superior wear resistance. This low-friction surface is essential for protecting delicate high-performance oil rings during installation. The interior features a smooth radius that tapers exactly to the 88.5mm bore size for repeatable, damage-free results every time.

• Exact Fit: Designed specifically for 88.5mm bore sizes.
• Friction Reduction: Hard-anodized and Teflon-coated finish for smooth piston movement.
• Tapered Design: Smooth internal radius compresses rings evenly and prevents snagging.
• Clear Identification: Laser-marked with size indication for quick tool selection.
• MPN: RCS08850

Ensure a precise and damage-free engine assembly with the Wiseco RCS08800 Piston Ring Compressor Sleeve. This 88.0mm precision tool is engineered to simplify the installation of high-performance pistons and rings by providing a smooth, even compression that prevents ring breakage or cylinder wall scoring.

The sleeve features a precision-machined internal radius that tapers down to the exact 88.0mm bore size. This design allows the piston assembly to slide into the cylinder block with minimal resistance. To further enhance performance and durability, the sleeve is hard-anodized and Teflon coated, providing a low-friction surface and excellent wear resistance for repeated use in professional engine building environments.

• Bore Size: 88.0mm
• Finish: Hard-anodized black and Teflon coated for low friction
• Design: Tapered internal radius for smooth ring compression
• Construction: Heavy-duty material with laser-marked sizing for easy identification
• MPN: RCS08800

Ensure a precise and damage-free engine assembly with the Wiseco RCS08750 87.5mm Piston Ring Compressor Sleeve. Engineered for professional engine builders, this fixed-bore sleeve features a smooth internal radius that tapers down to the exact 87.5mm bore size. This design eliminates the struggle of installing high-performance oil rings and allows for smooth, even compression as the piston is seated into the cylinder block.

• Bore Size: 87.5mm
• Material: Hard-anodized aluminum with a Teflon coating for low friction and superior wear resistance
• Design: Smooth radius taper facilitates seamless ring entry without catching
• Identification: Laser-marked with size for quick identification in the shop
• Manufacturer Part Number: RCS08750

By using a dedicated sleeve rather than a generic adjustable pliers-style compressor, you maintain consistent pressure around the entire circumference of the ring pack, significantly reducing the risk of ring breakage or bore scuffing during the short-block assembly process.

The Wiseco RCS08650 Piston Ring Compressor Sleeve is a precision-engineered tool designed to facilitate the seamless installation of pistons and rings into an 86.5mm bore. Unlike universal pliers-style compressors, this dedicated sleeve features a smooth internal radius that tapers down to the exact bore size, ensuring rings are compressed evenly and securely without snagging.

• Precision Engineering: Specifically sized for 86.5mm bores to prevent ring damage during assembly.
• Low-Friction Finish: Hard-anodized aluminum construction with a Teflon coating for superior wear resistance and reduced friction.
• High-Performance Compatibility: Specialized taper design simplifies the installation of high-tension high-performance oil rings.
• Clear Identification: Each sleeve is laser-marked with the bore size for quick selection in professional shop environments.
• Part Number: RCS08650

The Wiseco RCS08550 85.5mm Piston Ring Compressor Sleeve is a precision-engineered tool designed for engine builders who demand consistent, damage-free piston installation. Unlike adjustable pliers-style compressors, this fixed-diameter sleeve features a smooth internal radius that tapers precisely to 85.5mm. This geometry ensures the ring pack is compressed evenly 360 degrees around the piston, preventing ring breakage and simplifying the installation of delicate high-performance oil rings.

• Hard-anodized and Teflon-coated for exceptionally low friction and long-term wear resistance.
• Engineered with a smooth radius taper to guide rings into the bore without snagging.
• Provides uniform compression for even seating and reduced assembly risk.
• Laser-marked with size identification for quick reference in the shop.
• Manufacturer Part Number: RCS08550

The Wiseco RCS08500 85.0mm piston ring compressor sleeve is a precision tool designed to simplify engine assembly while protecting delicate high-performance oil rings. Engineered with a smooth radius that tapers down exactly to the 85.00mm bore size, this sleeve ensures rings are compressed evenly and smoothly as the piston is seated into the cylinder block.

Constructed for professional-grade durability, each sleeve is hard-anodized and Teflon coated. This combination significantly reduces friction during installation and provides long-term resistance to wear and abrasion from ring tension. The laser-marked size indication allows for quick identification in a busy shop environment, making it an essential component for any precision engine rebuild.

• Hard-anodized and Teflon coated for low friction and prolonged wear resistance
• Smooth radius taper designed for specific 85.0mm bore size
• Greatly reduces difficulty of installing high-performance oil rings
• Compresses piston rings smoothly and evenly to prevent breakage
• Laser-marked with size for easy identification
• Manufacturer Part Number: RCS08500

Ensure a precise and damage-free engine build with the Wiseco RCS08400 Piston Ring Compressor Sleeve. Specifically engineered for an 84.0mm bore, this tool eliminates the difficulty of seating high-performance piston rings by providing a smooth, tapered transition from the sleeve into the cylinder block.

Constructed for professional-grade durability, the sleeve is hard-anodized and Teflon-coated to create a low-friction surface that prevents ring snagging or marring. The internal geometry features a smooth radius that tapers down to the exact bore size, compressing the ring pack evenly and securely as the piston is installed. This design is particularly effective for delicate or high-tension performance oil rings that are prone to damage with universal-style pliers compressors.

• Manufacturer Part Number: RCS08400
• Bore Size: 84.0mm
• Material: Hard-anodized aluminum with Teflon coating for reduced friction
• Design: Tapered bore with a smooth entry radius for even ring compression
• Identification: Laser-marked size indication for easy tool management

Engineered for precision engine assembly, the Wiseco RCS08350 Piston Ring Compressor Sleeve provides a seamless solution for installing rings without risk of damage. This 83.50mm tool is forged in the USA and features a smooth internal radius that tapers specifically to the bore size, ensuring even compression of the piston rings—a critical step when handling high-performance oil rings with high tension.

To facilitate low-friction assembly and long-term durability, each sleeve is hard-anodized and Teflon-coated. This professional-grade finish protects the ring faces and provides a smooth path into the cylinder block. Each unit is laser-marked with its bore size for easy identification in a busy shop environment.

• Bore Diameter: 83.50mm
• Construction: Forged high-strength material
• Surface Treatment: Hard-anodized and Teflon-coated for low friction
• Tapered design for uniform ring compression and easy installation
• Laser-etched size indication for quick identification
• Manufacturer Part Number: RCS08350

Precision engine assembly requires the right tools to prevent ring damage and ensure proper seating. The Wiseco RCS08300 Piston Ring Compressor Sleeve is a professional-grade solution for installing pistons into 83.0mm bores. Forged in-house in the USA, this sleeve features a smooth internal radius that tapers down to the exact bore size, providing even, 360-degree compression as the piston passes through.

• Bore Size: 83.0mm
• Construction: Forged aluminum for strength and longevity
• Finish: Hard-anodized and Teflon coated to minimize friction and prevent wear
• Precision Taper: Smooth internal radius ensures seamless ring entry into the cylinder
• Oil Ring Support: Specifically designed to ease the installation of high-performance oil ring sets
• Identification: Laser-marked with size for quick identification on the workbench
• Part Number: RCS08300

By utilizing a fixed-diameter sleeve instead of a generic adjustable tool, builders eliminate the risk of ring snagging or breakage, ensuring a safe and efficient assembly process for high-performance engines.

Protect your engine investment during the assembly process with the Wiseco 81.50mm Piston Ring Compressor Sleeve. This precision-machined tool is engineered to simplify the installation of high-performance pistons and rings by providing a smooth, even compression that prevents ring breakage and cylinder wall scoring.

Constructed for professional use, the RCS08150 sleeve features a hard-anodized finish and a specialized Teflon coating. This combination significantly reduces friction and provides long-term wear resistance for repeated engine builds. The sleeve is machined with a smooth internal radius that tapers precisely to the 81.50mm bore size, ensuring even the most delicate oil rings are seated correctly as the piston assembly enters the block.

• Sized specifically for 81.50mm bore diameters
• Hard-anodized and Teflon coated for low friction and durability
• Tapered internal diameter ensures smooth, snag-free ring compression
• Laser-marked size identification for quick tool selection
• Manufacturer Part Number: RCS08150

Streamline your engine assembly and protect your components with the Wiseco RCS08100 Piston Ring Compressor Sleeve. Designed for a precise 81.0mm bore, this tool ensures that high-performance piston rings are compressed smoothly and evenly as they enter the cylinder, significantly reducing the risk of breakage or oil ring misalignment during installation.

Built to professional standards, the sleeve is hard-anodized and Teflon-coated to provide a low-friction surface and long-term wear resistance. The interior is machined with a smooth radius that tapers down to the exact bore size, allowing the piston assembly to slide into place with minimal resistance. Each sleeve is laser-marked for easy identification on the workbench.

• Bore Size: 81.0mm
• Material: Precision-machined aluminum
• Finish: Hard-anodized and Teflon coated for friction reduction
• Design: Smooth internal radius taper for even ring compression
• Identification: Laser-etched size marking
• Manufacturer Part Number: RCS08100

The Wiseco RCS08000 Piston Ring Compressor Sleeve is a precision engine-building tool designed to streamline the installation of pistons into an 80.0mm bore. Unlike universal pliers-style compressors, this dedicated sleeve features a smooth internal radius that tapers down to the exact bore size, ensuring rings are compressed evenly and safely to prevent snagging or breakage during assembly.

Built to withstand the rigors of professional engine assembly, the sleeve is hard-anodized and Teflon-coated. This specific finish reduces friction for a smooth piston drop while providing exceptional wear resistance. The tapered design is particularly effective for installing high-performance oil rings that often provide fitment challenges with standard tools.

• Bore Size: 80.0mm
• Material: Hard-anodized aluminum with Teflon coating for low friction
• Tapered internal diameter for even ring compression
• Smooth radius entry prevents ring damage
• Laser-marked with size for quick identification
• Manufacturer Part Number: RCS08000

The Wiseco RCS07900 79.00mm Piston Ring Compressor Sleeve is a precision-engineered tool designed to streamline high-performance engine assembly. Unlike universal pliers-style compressors, this dedicated sleeve features a smooth internal radius that tapers precisely to a 79.00mm bore, ensuring rings are compressed evenly and safely as the piston is seated in the cylinder.

Built for professional use, the sleeve is hard-anodized and Teflon-coated to minimize friction and prevent damage to delicate ring faces or coatings. This tapered design is particularly effective for installing high-performance oil rings without the risk of snagging or breakage. Each sleeve is laser-marked with its specific size for quick identification in the toolbox.

• Part Number: RCS07900
• Bore Size: 79.00mm
• Material: Hard-anodized aluminum with Teflon coating for low friction
• Design: Tapered bore for smooth, even ring compression
• Finish: Black anodized with laser-marked sizing

Streamline your engine assembly with the Wiseco RCS07850 78.50mm Piston Ring Compressor Sleeve. Forged in-house in the USA, this precision tool is engineered to solve the common challenges of installing high-performance pistons and fragile oil rings. The sleeve features a smooth radius that tapers specifically to a 78.50mm bore, ensuring rings are compressed evenly and safely as the piston is seated.

Constructed for longevity and performance, each sleeve is hard-anodized and Teflon coated to reduce friction and provide superior wear resistance during repeated use. This professional-grade tool eliminates the struggle of traditional adjustable compressors, offering a dedicated, repeatable fit for high-performance builds.

• Precision-machined with a smooth taper for effortless piston installation
• Hard-anodized and Teflon coated for low friction and durability
• Specifically designed to compress high-performance oil rings without damage
• Laser-marked with 78.50mm size for easy identification in the toolbox
• Forged aluminum construction manufactured in the USA
• Manufacturer Part Number: RCS07850