Fits select 1994-2003 Ford E-350, E-450, E-550, Excursion, F-250, F-350, F-450, and F-550 models (7.3L).

Mahle piston rings are engineered to meet strict original equipment requirements, providing a reliable seal for high-compression 7.3L turbo diesel engines. Designed for the Navistar 445 block, these rings focus on reducing friction and ring mass, which directly contributes to minimized oil consumption and an extended service life for the engine's rotating assembly.

As a leader in piston ring technology, Mahle ensures these components maintain proper cylinder wall tension under the extreme pressures of DI and IDI turbo diesel operation. This sleeve assembly ring set provides the precision tolerances necessary for a professional-grade engine overhaul or restoration of factory performance.

• Specifically for 7.3L Power Stroke Turbo Diesel engines
• Optimized to reduce internal friction and engine oil consumption
• Engineered for high durability in DI (Direct Injection) and IDI applications
• Precision tolerances to meet or exceed OE specifications
• Compatible with Navistar 445 and 96-100 sleeve assembly requirements

Fits select 1994-2003 Ford F-250, F-350, F-450, F-550 Super Duty, E-Series, and Excursion (7.3L Turbo Diesel).

Restore engine compression and efficiency with this Mahle piston ring set, engineered specifically for the Ford/Navistar 445 7.3L Turbo Diesel engine. These rings are designed to meet or exceed OE requirements, addressing the high-pressure demands of both Direct Injection (DI) and Indirect Injection (IDI) Power Stroke platforms. By utilizing advanced metallurgy and precise tolerances, Mahle rings effectively minimize engine oil consumption and reduce internal friction, extending the service life of your diesel powerplant.

• Engineered for the Navistar 445 (7.3L) Turbo Diesel engine
• Optimized to reduce friction and ring mass for improved response
• Designed to minimize oil blow-by and consumption
• Direct replacement for worn OE piston rings
• High-grade materials for long-term durability in heavy-duty towing and hauling

Fits select 1994-2003 Ford F-250/F-350/F-450/F-550 Super Duty, Excursion, and E-Series (7.3L Turbo Diesel).

This Mahle 445 Sleeve Assy piston ring set is engineered to meet the rigorous demands of the 7.3L Power Stroke and Navistar diesel platforms. Developed to satisfy OE requirements, these rings focus on reducing friction and ring mass to minimize oil consumption while providing a long-lasting service life in heavy-duty applications.

By utilizing advanced materials and precise manufacturing tolerances, MAHLE ensures that each ring in this set provides the necessary seal for the high-compression environment of a turbo diesel engine. Whether you are performing a standard refresh or a complete engine overhaul, these rings deliver the technical precision required for DI and IDI engines.

• Fits 7.3L Turbo Diesel (DI/IDI) Navistar engines
• Engineered to reduce internal friction and reciprocating mass
• Designed to minimize engine oil consumption and restore compression
• Manufactured to strict OE specifications for fit and finish
• Includes necessary rings for sleeve assembly applications
• Part Number: 445

Designed for high-performance builds, the Supertech Block Guard provides critical reinforcement to the cylinder walls in Honda H22, H23, and F22 (Single Cam) open-deck engines. By bracing the top of the cylinder sleeves, this component prevents "sleeve walk" and protects against cylinder failure under high-boost or high-RPM operation.

The BG-H22-F22 is precision CNC-machined for an exact press-fit. It features strategically placed coolant passages to ensure consistent thermal management across the block, preventing hot spots while significantly increasing the structural integrity of the assembly during extreme combustion pressures.

• Fits Honda H22, H23, and F22 (Single Cam) engines
• Reinforces cylinder walls to prevent cracking and movement
• CNC-machined for precise tolerances and easy installation
• Designed to maintain critical coolant flow to the cylinder head
• Manufacturer Part Number: BG-H22-F22

Strengthen your engine's cylinder architecture with the Supertech Block Guard, specifically engineered for the Nissan 350 VQ35DET. This kit includes both the left and right side guards to provide critical reinforcement for the factory open-deck block, bridging the gap between the cylinder walls and the outer block casting.

Designed for high-performance and forced induction builds, these guards effectively convert an open-deck block into a semi-closed deck. This significantly reduces cylinder sleeve walk and bore distortion under high boost or extreme RPM, protecting against head gasket failure and cracked bores. Each guard is CNC-machined for a precise press-fit and features integrated coolant passages to maintain efficient thermal management and prevent hotspots.

• Fits Nissan 350 VQ35DET engines
• Includes Left and Right side block guards
• Precision CNC-machined from high-strength aluminum
• Reinforces cylinder walls to prevent sleeve movement and cracking
• Strategically placed coolant ports preserve factory cooling flow
• Manufacturer Part Number: BG-VQ35-DET

Fits 2000-2009 Honda S2000 models equipped with F20C or F22C engines.

The Supertech BG-S2000 Block Guard is a critical engine reinforcement for high-performance F-Series builds. By converting the factory open-deck block into a semi-closed deck, this component provides essential support to the upper cylinder walls. This reinforcement significantly reduces cylinder sleeve walk and vibration, which are common failure points in high-boost or high-compression naturally aspirated applications.

Precision CNC-machined from high-strength aluminum, this block guard is designed for a precise press-fit into the engine's water jacket. Supertech engineers the guard with strategically placed coolant passages to ensure that while the cylinder walls are stabilized, the engine maintains optimal thermal transfer and cooling efficiency across all four cylinders.

• Prevents cylinder sleeve failure and cracking during high-load operation
• CNC-machined aluminum construction for maximum structural integrity
• Integrated coolant ports to prevent hotspots and maintain factory cooling flow
• Essential for turbocharged, supercharged, or high-revving competition engines
• Manufacturer Part Number: BG-S2000

The Supertech Block Guard for the Nissan QR25DE engine provides essential reinforcement for open-deck blocks in high-horsepower and forced-induction applications. This precision-machined component installs into the top of the block's coolant jacket to stabilize the cylinder sleeves, effectively preventing "sleeve walk" and wall failure under extreme cylinder pressures.

Engineered for maximum durability without sacrificing thermal management, the BG-QR25DE features strategically placed passages to maintain critical coolant flow to the cylinder head. It is a vital upgrade for performance builders looking to push the limits of the QR25DE platform while ensuring long-term structural integrity.

• Designed specifically for the Nissan QR25DE open-deck block
• CNC-machined for precise fitment and maximum cylinder wall support
• Minimizes cylinder wall flex and distortion under high boost or high RPM
• Maintains necessary coolant flow for proper engine temperature regulation
• Manufacturer Part Number: BG-QR25DE

Fits Honda K24 engines.

The Supertech Block Guard (BG-K24) provides essential reinforcement for the cylinder sleeves in Honda K24 engine blocks. This component is designed to stabilize the cylinder walls, preventing the sleeve walk and distortion that can occur during high-load, high-RPM, or forced induction operation.

• Specifically engineered for the Honda K24 engine block
• Helps prevent cylinder sleeve failure and maintains bore integrity
• Includes strategic coolant passages to maintain proper thermal management
• Manufacturer Part Number: BG-K24

Reinforce your engine block for high-performance use with the Supertech Block Guard (BG-K20), specifically designed for Honda K20 series engines. In high-boost or high-RPM applications, the factory open-deck design of the K20 block can allow for "cylinder walk," where the sleeves shift under extreme cylinder pressure. This movement can lead to head gasket failure and improper ring seating.

Precision CNC-machined from 6061-T6 aluminum, this block guard is press-fit into the top of the water jacket to stabilize the cylinder sleeves and maintain bore roundness. Supertech incorporates strategic coolant bypass holes to ensure consistent cooling and prevent hotspots during operation.

• Fits Honda K20 series engines
• Manufacturer Part Number: BG-K20
• Constructed from high-strength 6061-T6 aluminum
• Protects against cylinder sleeve movement and head gasket failure
• Engineered with coolant flow passages to maintain factory cooling efficiency

Reinforce your engine block's structural integrity with the Supertech BG-H22A Block Guard. Specifically engineered for the Honda H22A, this component addresses the inherent weaknesses of an open-deck block design. By providing critical support to the upper cylinder walls, it minimizes cylinder sleeve deflection and "sleeve walk," which are common failure points in high-performance builds.

• Precision-machined to ensure a secure fit within the engine's coolant jacket.
• Features integrated coolant passages to maintain proper thermal management and flow to the cylinder head.
• Reduces the risk of cylinder wall cracking under high-boost or high-RPM conditions.
• Essential for turbocharged, supercharged, or high-compression H22A builds.
• Manufacturer Part Number: BG-H22A

Reinforce your Subaru EJ20 engine block against the stresses of high-boost and high-RPM applications with the Supertech Block Guard (BG-EJ20). Precision CNC-machined from high-strength aluminum, this guard press-fits into the open-deck water jacket to provide critical lateral support to the upper cylinder walls. This reinforcement significantly reduces cylinder sleeve walk and helps prevent block failure or cracking under extreme combustion pressures.

• Specifically engineered for the Subaru EJ20 engine platform
• CNC-machined for precise tolerances and a secure press-fit
• Strategically designed coolant passages maintain thermal efficiency and flow to the cylinder head
• Prevents cylinder wall distortion in forced induction builds
• Manufacturer Part Number: BG-EJ20
• Quantity: 2 units (complete set for one EJ20 engine)

Reinforce your Honda D-series open-deck block with the Supertech Block Guard (BG-D15-D16). Fits Honda D15B, D16Z, and D16Y single overhead cam (SOHC) engines.

This precision-engineered component is designed to provide critical support to the upper cylinder walls, significantly reducing sleeve walk and preventing cylinder cracking in high-performance or high-boost applications. By strengthening the deck surface, it ensures better head gasket sealing and maintains cylinder roundness under extreme combustion pressures.

• Fits Honda D15B, D16Z, and D16Y SOHC engines
• Reinforces upper cylinder walls to prevent sleeve deflection
• Engineered to allow for essential coolant flow to the cylinder head
• Ideal for forced induction or high-RPM naturally aspirated builds
• Manufacturer Part Number: BG-D15-D16

Strengthen your engine's foundation with the Supertech BG-B20 block guard, specifically designed for Honda B20 series engines. This precision-engineered component is essential for high-performance builds, particularly those utilizing forced induction or high-compression setups where cylinder wall integrity is at risk.

By reinforcing the top of the cylinder sleeves, this block guard prevents "sleeve walk" and cracking, effectively converting an open-deck block into a more robust semi-closed deck configuration. Supertech manufactures these guards to exacting tolerances to ensure a perfect fit and reliable performance under extreme thermal and mechanical stress.

• CNC machined from high-strength 6061 aluminum alloy
• Engineered with precision coolant passages to maintain proper flow to the cylinder head
• Reduces cylinder sleeve vibration and movement during high-RPM operation
• Provides critical support for high-boost B20 applications
• Manufacturer Part Number: BG-B20

Protect your engine's cylinder walls with the Supertech Block Guard (BG-B16), specifically engineered for Honda B16A and B18C engine blocks. In high-performance applications—particularly those featuring forced induction or high compression—open-deck blocks are susceptible to cylinder sleeve walk and cracking. This precision-machined block guard provides the structural reinforcement necessary to maintain bore roundness under extreme combustion pressures.

Designed for a precise press-fit into the factory water jacket, this component bridges the gap between the cylinder sleeves and the outer block wall. The design incorporates strategically placed coolant passages to ensure efficient thermal management and prevent localized hotspots while maintaining maximum sleeve support.

• Manufacturer Part Number: BG-B16
• Provides critical reinforcement for open-deck Honda B-series engine blocks
• CNC-machined for exact tolerances and easy installation
• Integrated coolant ports preserve proper flow to the cylinder head
• Essential for high-boost, nitrous, or high-RPM race builds

The Fragola Performance Systems -4AN Steel Tube Sleeve (MPN 581904) is a critical component for plumbing custom hard lines. This sleeve slides onto the tubing before flaring, providing the necessary support and surface area for a tube nut to secure a 37-degree flare. Manufactured from high-strength steel, this sleeve is designed to withstand the pressures and vibrations common in automotive fuel, oil, and coolant systems.

• Part Type: Tube Sleeve
• Manufacturer Part Number: 581904
• Size: -4AN
• Material: Steel
• Application: Used with 37-degree flared hard tubing
• Finish: Natural

The Fragola Performance Systems 581903 -3AN Tube Sleeve is an essential component for plumbing custom hardline systems. Designed for use in high-pressure automotive applications, this sleeve slides over the tubing and works in tandem with a tube nut to provide structural support for a 37-degree flare. This ensures a secure, leak-free seal when mating hard tubing to AN adapter fittings.

• Manufacturer Part Number: 581903
• Fitting Size: -3AN
• Material: High-strength steel for maximum durability
• Compatibility: Designed for use with 3/16-inch hardline (requires 37-degree flare)
• Ideal for custom brake, clutch, or hydraulic line plumbing

Fragola Performance Systems -8AN tube sleeves are precision-engineered for plumbing hard lines. Designed to work in conjunction with tube nuts, these sleeves distribute pressure evenly across the flared end of the tubing to ensure a secure, leak-free connection to AN fittings.

• Part Type: Tube Sleeve
• Fitting Size: -8AN
• Material: Lightweight Aluminum
• Finish: Black Anodized
• Quantity: 10 Pack
• Manufacturer Part Number: 481908-BL-10

These sleeves are ideal for automotive plumbing projects involving fuel, oil, or coolant hard lines, providing a professional finish and durable performance in high-vibration environments.

Fragola Performance Systems tube sleeves are essential for plumbing professional-grade hard lines. Designed for use in conjunction with tube nuts, these -6AN sleeves slide onto the tubing before flaring, providing a stable seat and ensuring even pressure is applied to the 37-degree flare for a leak-free seal.

• Part Type: Tube Sleeve
• Size: -6AN
• Finish: Black Anodized
• Quantity: 10 Pack
• Manufacturer Part Number: 481906-BL-10

These sleeves are precision-machined to exacting tolerances, ensuring consistent fitment across fuel, oil, or coolant hard line assemblies. Use these to secure your hard lines to AN adapter fittings while maintaining a clean, professional appearance in the engine bay.

The Fragola -6AN Aluminum Tube Sleeve is an essential component for plumbing custom hard lines in automotive fuel, oil, or coolant systems. Engineered to work in conjunction with a -6AN tube nut, this sleeve provides a secure, leak-free mating surface when flaring 3/8-inch aluminum, steel, or stainless tubing to a 37-degree AN specification.

• Size: -6AN
• Compatibility: Designed for use with 3/8" OD hard lines
• Material: Precision-machined aluminum for durability and weight savings
• Finish: Black anodized for superior corrosion resistance and a clean look
• Function: Supports the tube flare to ensure a reliable seal under pressure
• Manufacturer Part Number: 481906-BL

Ensure a secure, leak-free connection for your automotive hard-line plumbing with the Fragola Performance Systems -4AN Tube Sleeve. This essential component is designed to work in conjunction with a tube nut, sliding over the tubing prior to flaring to provide a solid, even mating surface against the AN adapter fitting.

Precision-machined for exact tolerances, this sleeve prevents the tube nut from galling the flared end of the line during assembly, ensuring a repeatable and reliable seal. It is an ideal solution for custom fuel, oil, brake, or coolant lines where professional-grade performance and durability are required.

• Manufacturer Part Number: 481904-BL
• Fitting Size: -4AN
• Material: Lightweight Aluminum
• Finish: Black Anodized for corrosion resistance
• Application: Used with a tube nut for 37-degree flared hard lines

Fragola Performance Systems tube sleeves are essential components for finishing custom hard lines in your vehicle's plumbing system. These -3AN sleeves are designed to work in conjunction with a tube nut to provide a secure, leak-free connection when flaring aluminum or steel hard tubing for use with AN adapter fittings.

• Fitting Size: -3AN
• Material: Lightweight aluminum construction
• Finish: Black anodized for corrosion resistance
• Application: Used with tube nuts to secure 37-degree flared hard lines
• Quantity: 10 Pack
• Manufacturer Part Number: 481903-BL-10

Ideal for brake lines, clutch systems, and small-diameter fluid transfers, these sleeves ensure proper alignment and support for the flared tube seat, preventing leaks under pressure.

The Fragola -3AN Tube Sleeve is a critical component for creating secure, leak-free connections in custom automotive plumbing. Designed to be used in conjunction with a tube nut, this sleeve slides over hard tubing prior to flaring, providing the necessary support and surface area for the nut to seat correctly against the flare.

Constructed for durability and precision, this sleeve ensures even pressure distribution, preventing damage to the tubing while maintaining a high-pressure seal. Its black finish offers a professional appearance and added protection against the elements in fuel, oil, or brake system applications.

• Product Type: Tube Sleeve
• Fitting Size: -3AN
• Finish: Black Anodized
• Manufacturer Part Number: 481903-BL
• Compatibility: For use with -3AN flared hard lines and matching tube nuts

Fits select 1983-2008 Ford (F-150, F-250, Mustang, Bronco, E-150), Lincoln (Town Car, Continental), and Mercury models.

The Fel-Pro 16250 shaft repair sleeve is a precision-engineered solution designed to restore worn or scored sealing surfaces on rotating shafts. Often used when a standard seal cannot provide a reliable interface due to surface imperfections, this sleeve provides a new, smooth running surface to eliminate leaks and extend the life of the component without the need for costly shaft replacement.

Built using proprietary materials specifically for the automotive repair environment, Fel-Pro repair sleeves are validated for fit, form, and function to meet or exceed original equipment specifications. This Engine$aver hardware solution is ideal for high-mileage vehicles where traditional seals may fail against worn metal.

• Repairs worn sealing surfaces to ensure a leak-free repair
• Specifically engineered and manufactured for the real-world repair environment
• Restores OE-level tolerances for reliable sealing performance
• Engine$aver hardware design helps avoid expensive component replacement
• Validated for fit, form, and function across diverse applications
• Manufacturer Part Number: 16250

Fits 1993-2001 Honda Prelude Base, Type SH, and VTEC models (2.2L H22A).

The BLOX Racing Block Guard is engineered to reinforce the open-deck design of the H22A engine, providing the cylinder sleeve support necessary for high-performance builds. By stabilizing the top of the cylinder walls, this precision-machined component prevents cylinder "walk" and sleeve cracking, which are common points of failure in high-boost, nitrous, or high-RPM applications.

This block guard transforms the block into a semi-closed deck configuration, improving head gasket sealing and maintaining bore geometry under extreme combustion pressures. It is designed with strategically placed coolant passages to ensure consistent heat dissipation and prevent localized hot spots, protecting your engine's cooling efficiency while increasing its structural integrity.

• Engine Application: H22A (2.2L DOHC VTEC)
• Reinforces cylinder sleeves to prevent wall flex and failure
• Essential for forced induction or high-compression engine builds
• Precision-machined with integrated coolant flow passages
• Manufacturer Part Number: BXPT-10202

Fits 1992-2000 Honda Civic and Civic del Sol models (1.6L).

The BLOX Racing Block Guard is a critical upgrade for high-performance Honda D-series engines. By reinforcing the cylinder walls of the factory open-deck block, this component prevents cylinder sleeve walk and potential failure during high-RPM or forced induction applications. It is designed to provide maximum support while maintaining essential coolant flow to the upper cylinder head area.

• Reinforces the cylinder sleeves to prevent movement and cracking
• Designed for high-boost or high-RPM engine builds
• Precision fit for 1.6L SOHC VTEC and non-VTEC engines
• Manufacturer Part Number: BXPT-10201

The BLOX Racing Block Guard (BXPT-10200) is a critical upgrade for high-performance B-Series engines, providing essential reinforcement to the engine's open-deck design. Fits select 1994-2001 Acura Integra and Honda Civic models (1.6L / 1.8L DOHC VTEC).

By bridging the gap between the cylinder sleeves and the block deck, this component prevents sleeve "walking" and cracking that often occurs under high boost or extreme cylinder pressures. It is CNC-machined for a precise fit within the water jacket and features engineered coolant passages to maintain thermal efficiency and prevent hot spots. This is a must-have for forced induction builds or high-compression naturally aspirated racing engines where block integrity is paramount.

• Manufacturer Part Number: BXPT-10200
• Reinforces the upper cylinder sleeves to prevent sleeve walk
• CNC-machined from high-grade aluminum for precise tolerances
• Integrated coolant passages maintain proper water flow and cooling
• Ideal for high-boost, nitrous, or high-RPM applications

Vehicle Fitment

• 1994-2001 Acura Integra GS-R
• 1997-2001 Acura Integra Type R
• 1999-2000 Honda Civic Si
• 1994-1997 Honda Civic del Sol VTEC