Fits select 2004-2007 Dodge Ram 2500 and 3500 trucks with the Cummins 600 engine.

Optimize your diesel's performance with the Diamond Eye K4234A 4-inch cat-back exhaust system. Engineered for the 2004-2007 Dodge Ram Cummins, this single-exit kit is constructed from high-quality aluminized steel for a balance of durability and value. By utilizing precision CNC mandrel bending, this system ensures smooth exhaust gas flow, reducing backpressure and helping to manage EGTs during towing or heavy-duty use.

This kit replaces the restrictive factory components from the catalytic converter back, utilizing a large 4-inch outer diameter to maximize volume. Diamond Eye designs their systems for straightforward installation, using vehicle-specific routing to clear factory chassis components.

• Part Number: K4234A
• Material: Aluminized Steel
• Tubing Diameter: 4-inch OD
• Bending: CNC Mandrel Bent
• Configuration: Cat-Back Single Exit
• Fitment: Cummins 600 High Output Models

Fitment Table:

Fits 1994-2002 Dodge Ram 2500 and 3500 Base models (5.9L).

Improve the exhaust flow and performance of your second-generation Cummins diesel with the Diamond Eye K4214A-RP turbo-back exhaust system. This 4-inch diameter kit is engineered to replace the restrictive factory exhaust from the turbocharger back to the tailpipe, featuring a muffler replacement pipe for maximum flow and an aggressive sound profile.

Each system is manufactured using precision CNC mandrel-bending technology to ensure consistent diameter throughout the bends, reducing backpressure and helping to lower exhaust gas temperatures (EGTs). Constructed from durable aluminized steel, this dual-exit kit provides a high-performance alternative to stock components, designed specifically for the 5.9L powertrain.

• Manufacturer Part Number: K4214A-RP
• Tubing Diameter: 4-inch
• System Type: Turbo-Back
• Configuration: Dual Exit
• Material: Aluminized Steel
• Components: Muffler replacement pipe, mandrel-bent tubing, and installation hardware

Fits 1994-2002 Dodge Ram 2500 and 3500 models equipped with the 5.9L engine.

Improve exhaust flow and reduce backpressure on your 5.9L Cummins with this 4-inch turbo-back exhaust system from Diamond Eye Manufacturing. This kit (MPN: K4212A-RP) is engineered using CNC mandrel-bent tubing to ensure consistent diameter throughout every curve, minimizing turbulence and lowering exhaust gas temperatures (EGTs). Constructed from durable aluminized steel, this system includes a muffler replacement pipe to provide a more aggressive exhaust note and maximum flow efficiency by removing the restrictive factory muffler.

• 4-inch OD mandrel-bent tubing for superior flow volume
• Aluminized steel construction for reliable performance and corrosion resistance
• Complete turbo-back configuration includes muffler replacement pipe
• Single-exit design specifically tuned for 1994-2002 Dodge heavy-duty trucks
• Designed for straightforward installation using existing factory mounting points
• Manufacturer Part Number: K4212A-RP

Fits 1994-2002 Dodge Ram 2500 and 3500 (5.9L).

Upgrade your diesel's performance and efficiency with the Diamond Eye K4212A 4" Turbo-Back Single Exhaust Kit. This system is engineered to maximize exhaust flow and reduce backpressure by replacing the restrictive factory tubing from the turbo outlet back. Constructed from durable aluminized steel, each pipe is shaped using precision CNC mandrel-bending technology to ensure a consistent diameter through every bend, preventing the turbulence common in crush-bent alternatives.

• Manufacturer Part Number: K4212A
• System Diameter: 4-inch
• Material: Heavy-duty aluminized steel
• System Type: Turbo-back single exit
• Construction: CNC mandrel-bent tubing for optimal flow
• Compatibility: Engineered for the 1994-2002 Dodge Ram 5.9L Cummins platform

Fits 1989-1993 Dodge W250 and W350 models equipped with the 5.9L Cummins engine.

The Diamond Eye K4211A-RP turbo-back exhaust kit is engineered to significantly reduce backpressure and lower exhaust gas temperatures (EGTs) by replacing the restrictive factory system. This kit features a muffler replacement pipe (muffler delete) to provide a straight-through flow path, maximizing the performance and sound of the 12-valve Cummins powerplant. Constructed using CNC mandrel-bending technology, the 4-inch aluminized steel tubing maintains its diameter throughout every bend for consistent exhaust velocity.

• System Type: Turbo-Back
• Tubing Diameter: 4.0"
• Exit Style: Single Exit
• Material: Aluminized Steel
• Includes: Muffler replacement pipe for maximum flow
• Manufacturing: CNC Mandrel-bent for optimal exhaust scavenging
• Manufacturer Part Number: K4211A-RP

Fits 1989-1993 Dodge W250 and W350 4-wheel drive models (5.9L Cummins).

Improve your 1st Gen Dodge Cummins' performance and exhaust flow with the Diamond Eye K4211A 4-inch turbo-back exhaust system. Engineered specifically for 4WD applications, this single-exit system replaces the restrictive factory piping with high-flow, CNC mandrel-bent tubing to reduce backpressure and help lower exhaust gas temperatures (EGTs).

Constructed from durable aluminized steel, this kit is designed for precise fitment and long-term reliability. Diamond Eye utilizes state-of-the-art research and development to ensure each component meets strict tolerances for a straightforward installation on your W-series truck.

• Part Number: K4211A
• System Type: Turbo-Back
• Tubing Diameter: 4-inch
• Material: Aluminized Steel
• Configuration: Single Exit
• Fitment Note: 4-Wheel Drive (4WD) Models Only

Fits 1989-1993 Dodge D250 and D350 2-wheel drive models (5.9L).

Eliminate exhaust restrictions and improve the sound profile of your first-generation Cummins with this Diamond Eye turbo-back muffler replacement pipe. This 4-inch diameter component is designed to replace the factory muffler section, providing a more direct path for exhaust gases to exit. By reducing backpressure, this pipe helps manage EGTs and improves overall engine efficiency during towing or heavy-duty use.

Constructed from high-quality aluminized steel, this pipe utilizes CNC mandrel bending to maintain a constant diameter throughout every curve, preventing the flow turbulence common in crush-bent alternatives. Specifically engineered for 2WD chassis configurations, it ensures proper clearance around factory drivetrain components for a straightforward installation.

• Manufacturer Part Number: K4209A-RP
• Tubing Diameter: 4-inch OD
• Material: Aluminized Steel
• Exit Type: Single Exhaust
• Bending Type: CNC Mandrel Bent
• Configuration: Turbo-Back Muffler Replacement (2WD Only)

Fits select 2001-2005 Chevrolet Silverado and GMC Sierra 2500 HD/3500 models (6.6L).

This Diamond Eye 4-inch Cat-Back Muffler Replacement Pipe Kit is engineered to eliminate the restrictive factory muffler on your Duramax diesel truck. By replacing the OE muffler with a straight-through pipe, you can significantly reduce backpressure and lower exhaust gas temperatures (EGTs) while achieving a more aggressive exhaust note. This kit is a direct-fit solution designed to work with your existing exhaust components.

Built in the USA using high-precision CNC mandrel-bending machines, this pipe ensures consistent diameter throughout every bend to maintain maximum exhaust velocity. The aluminized steel construction provides a durable and cost-effective alternative to stainless steel, perfect for trucks in moderate climates.

• Manufacturer Part Number: K4110A-RP
• Tubing Diameter: 4.0 inches
• Material: Aluminized Steel
• Exit Style: Single, Cat-Back
• Installation: Replaces factory muffler section
• Finish: Natural
• Engineered for 6.6L Duramax applications

Fits 2001-2005 Chevrolet Silverado and GMC Sierra 2500 HD/3500 models (6.6L).

Improve your truck's exhaust flow and performance with the Diamond Eye K4110A 4-inch cat-back exhaust system. This single-exit kit is engineered using precision CNC mandrel-bending technology, which maintains a consistent 4-inch outer diameter throughout every bend to minimize restrictive backpressure. Constructed from high-quality aluminized steel, this system provides a durable and cost-effective solution for lowering EGTs and enhancing the sound profile of your heavy-duty truck.

• Part Number: K4110A
• 4-inch mandrel-bent tubing for maximum flow and efficiency
• Single exit cat-back configuration
• Constructed from corrosion-resistant aluminized steel
• Designed for 2001-2005 GM 2500 HD and 3500 chassis
• Includes all necessary hardware for a complete installation

The Diamond Eye BC350A 3.5-inch aluminized band clamp provides a high-strength, leak-free seal for exhaust system connections. Designed to join 3.5-inch OD tubing, this clamp is an ideal solution for modular exhaust assembly and repair, allowing for secure fastening without the need for welding or causing the pipe distortion typically associated with standard U-bolt clamps.

Constructed from aluminized steel, this band clamp offers dependable corrosion resistance and durability under the high-heat conditions of an exhaust stream. It includes metric hardware for precise torque application and a secure fit, ensuring the exhaust components remain properly aligned and sealed during vehicle operation.

• Manufacturer Part Number: BC350A
• Clamp Diameter: 3.5 inches (3-1/2")
• Material: Aluminized Steel
• Hardware: Metric bolts and nuts
• Type: Band Clamp (AL)
• Application: Exhaust system pipe-to-pipe or pipe-to-muffler connections

The Diamond Eye Big Dog Quiet Tone muffler is engineered for high-volume exhaust systems that require significant sound attenuation without sacrificing flow efficiency. Featuring a robust baffled internal design, this muffler is specifically built to reduce the harsh exhaust notes and interior drone often associated with large-diameter performance exhaust systems. It is an ideal solution for heavy-duty applications where a quieter, more refined tone is required.

• Construction: Durable aluminized steel for corrosion resistance and longevity.
• Internal Design: Fully baffled to provide maximum sound suppression (Quiet Tone series).
• Configuration: Single Inlet / Single Outlet design.
• Installation: Designed for custom fabrication or as a replacement in 5-inch exhaust systems.

Technical Specifications:

• Inlet/Outlet: 5-inch ID
• Body Diameter: 10-inch
• Body Length: 45-inch
• Overall Length: 51-inch
• Manufacturer Part Number: 800465

This Diamond Eye 5-inch 90-degree exhaust elbow is engineered for custom exhaust fabrication and high-flow applications. Constructed from durable stainless steel, it features precise CNC mandrel bending to maintain a consistent internal diameter throughout the bend, minimizing backpressure and optimizing exhaust flow.

• Diameter: 5 inches (OD)
• Bend Angle: 90 Degrees
• Center Line Radius (CLR): 8 inches
• Material: Stainless Steel
• Construction: CNC Mandrel Bent
• Manufacturer Part Number: 529026

Designed for heavy-duty performance and custom exhaust routing, this elbow offers the corrosion resistance and structural integrity required for long-term reliability in demanding automotive environments.

Ensure maximum flow and durability in your custom exhaust setup with the Diamond Eye 4-inch Stainless Steel 90-Degree Elbow. Engineered for performance-oriented fabrication, this component utilizes CNC mandrel bending to maintain a constant diameter through the radius, preventing the restrictive necking common in standard crush-bent tubing.

• Material: High-grade stainless steel for superior corrosion resistance and longevity in high-heat environments.
• Diameter: 4.0" OD (Outer Diameter) to match heavy-duty and performance exhaust systems.
• Bend Angle: Precision 90-degree elbow for tight routing requirements.
• Construction: CNC mandrel-bent to ensure smooth internal walls and optimal exhaust gas velocity.
• Manufacturer Part Number: 529021

This component is ideal for fabricators building or repairing custom downpipes, mid-sections, or tailpipe exits where airflow efficiency is critical. Diamond Eye components are manufactured to strict tolerances, providing a reliable and professional-grade solution for your exhaust project.

Engineered for high-performance exhaust fabrication and custom plumbing, the Diamond Eye 5-inch 45-degree aluminized steel elbow provides a durable, high-flow solution for heavy-duty systems. This component is produced using precision CNC mandrel bending, which ensures the tube maintains its full diameter throughout the bend to eliminate turbulence and backpressure common in crush-bent piping.

• Material: Aluminized Steel
• Outside Diameter (OD): 5 inches
• Bend Angle: 45 Degrees
• Construction: CNC Mandrel Bent
• Manufacturer Part Number: 524525

Built by Diamond Eye Manufacturing, this elbow is designed to withstand the rigors of performance applications while offering the weldability and fitment accuracy required for custom exhaust builds.

This Diamond Eye 4-inch 45-degree exhaust elbow is designed for high-performance fabrication and custom exhaust system builds. Constructed from high-grade stainless steel, this component provides superior corrosion resistance and longevity compared to standard aluminized steel, making it ideal for harsh undercar environments and heavy-duty applications.

Precision engineered using CNC mandrel-bending technology, this elbow maintains a consistent 4.0-inch outer diameter (OD) throughout the entire radius of the bend. This process eliminates the restrictive cross-section reduction found in traditional crush-bending, ensuring maximum exhaust flow and reduced backpressure for better engine efficiency.

• Manufacturer Part Number: 524521
• Outer Diameter: 4.0 inches
• Bend Angle: 45 Degrees
• Material: Stainless Steel (SS)
• Construction: CNC Mandrel Bent
• Replaces Legacy Part Number: 432-445 SS

Fits 2004-2007 Dodge Ram 2500 and 3500 models across Laramie, SLT, Sport, ST, and TRX4 trims.

Streamline your exhaust system with the Diamond Eye 4-inch Muffler Replacement Pipe. This CNC mandrel-bent component is designed to replace the restrictive factory muffler (OEMR400), allowing for improved exhaust flow and reduced backpressure. By maintaining a consistent 4-inch diameter through every bend, this pipe helps manage EGTs and provides a more aggressive exhaust note without the cost of a full cat-back system.

Diamond Eye utilizes state-of-the-art research and development to ensure precise fitment. This muffler delete pipe is fabricated with high-quality materials to provide a durable, direct-fit solution that bolts into the factory location. It is designed to meet CARB equivalent standards where applicable.

• 4-inch mandrel-bent tubing for optimal flow characteristics
• Direct replacement for the stock muffler assembly
• CNC manufactured for precise fitment and clearance
• Compatible with factory mounting points and hangers
• Engineered to maintain CARB equivalent standards
• Manufacturer Part Number: 510216 (OEMR400)

The Diamond Eye 510215 Muffler Replacement Pipe is a precision-engineered solution for exhaust systems requiring a high-flow, 3.5-inch outer diameter configuration. With a 30-inch finished overall length, this pipe allows for the removal of restrictive factory mufflers to improve exhaust velocity and overall system efficiency.

Built in the USA using state-of-the-art CNC mandrel bending equipment, this replacement pipe maintains its internal diameter through every bend, eliminating the flow restrictions common in standard crush-bent tubing. Diamond Eye Manufacturing's extensive fabrication tolerances ensure a reliable fit and durable service life under demanding conditions.

• Manufacturer Part Number: 510215
• Pipe Diameter: 3-1/2 inches (3.5" OD)
• Overall Length: 30 inches
• Material: CNC mandrel-bent steel
• Standards: NFS w/ CARB Equiv Stds PHIS26
• Design: Direct-fit replacement for specific 3.5-inch exhaust segments

Upgrade your exhaust flow with the Diamond Eye 4-inch Stainless Steel Muffler Replacement Pipe. Designed to replace restrictive factory mufflers, this straight-through pipe reduces backpressure and helps lower exhaust gas temperatures (EGTs) for improved engine efficiency and a more aggressive sound profile.

Constructed from high-quality stainless steel, this pipe is built to resist corrosion and handle the thermal stress of heavy-duty use. It features CNC mandrel bending, which maintains a consistent 4-inch diameter throughout the length of the pipe to prevent flow turbulence commonly found in standard crush-bent tubing.

• Part Type: Muffler Replacement Pipe
• Tubing Diameter: 4 inches
• Overall Length: 30 inches
• Material: Stainless Steel
• Manufacturing Process: CNC Mandrel-Bent
• Manufacturer Part Number: 510210

Eliminate exhaust restriction and optimize flow with the Diamond Eye MR400 Muffler Replacement Pipe. This component is designed for enthusiasts looking to replace a restrictive factory muffler with a straight-through design to improve exhaust velocity and achieve a more aggressive sound profile.

Built from heavy-duty aluminized steel, this pipe is manufactured using precision CNC mandrel bending. Unlike crush-bent tubing, mandrel bending maintains a consistent 4-inch diameter throughout, preventing turbulence and backpressure. The 30-inch length provides ample material for integration into existing exhaust setups or Diamond Eye performance systems.

• Manufacturer Part Number: 510205
• Series: MR400
• Material: Aluminized Steel
• Diameter: 4.0 in.
• Overall Length: 30.0 in.
• Construction: CNC Mandrel-Bent

The Diamond Eye 460005 muffler is a high-flow exhaust solution designed for performance applications requiring effective sound attenuation without sacrificing exhaust velocity. Constructed from heavy-duty aluminized steel, this muffler offers excellent corrosion resistance and thermal management for long-term durability in demanding environments.

The internal 4-inch louvered core is engineered to break up harsh exhaust notes and drone by creating turbulence along the inner walls while maintaining a straight-through flow path. This design ensures your engine breathes efficiently, making it an ideal choice for heavy-duty diesel or high-displacement gasoline builds where backpressure reduction is critical.

• Material: Durable aluminized steel construction
• Core Design: High-flow louvered internal core
• Inlet/Outlet Diameter: 4.0 inches
• Overall Length: 30.0 inches
• Manufacturing: Precision CNC mandrel-processed components
• Part Number: 460005

Upgrade your vehicle's exhaust profile with the Diamond Eye Performance bolt-on exhaust tip. This heavy-duty tip is designed to transition a 4-inch tailpipe to a massive 5-inch outlet, providing a significantly more aggressive aesthetic. The 12-inch overall length and 15-degree rolled angle cut ensure a clean, finished look that follows the natural lines of your vehicle's bodywork.

• Inlet Diameter: 4 inches
• Outlet Diameter: 5 inches
• Overall Length: 12 inches
• Cut Type: 15-degree rolled angle cut
• Installation: Bolt-on design for a secure, weld-free fitment
• Detailing: Features an embossed Diamond Eye logo
• Manufacturer Part Number: 4512BRA-DE

Manufactured by Diamond Eye, this component is built using the same precision CNC mandrel bending and fabrication expertise the brand applies to its full performance exhaust systems. It offers a durable solution for those looking to refresh a worn factory tip or complete a custom exhaust build with a professional exit point.

Tame exhaust drone and harsh rasp without sacrificing flow with the Diamond Eye 4-inch Aluminized Steel Exhaust Resonator. Designed to smooth out the exhaust note on high-performance diesel or gasoline systems, this resonator features a straight-through design that maintains exhaust velocity while targeting annoying cabin frequencies. The aluminized steel construction provides reliable durability and heat resistance for standard road use.

This specific unit (400405) is engineered with clamped ends, allowing for a secure installation and simplified serviceability compared to traditional weld-on components. It is an ideal solution for builders looking to refine the sound profile of a 4-inch diameter exhaust system while utilizing Diamond Eye's CNC-mandrel-bent precision for consistent performance and fitment.

• Manufacturer Part Number: 400405
• Diameter: 4.0 inches
• Material: Aluminized Steel
• Connection Type: Clamped Ends
• Design: High-flow straight-through internal geometry

Fits select 2004-2010 Chevrolet Silverado and GMC Sierra 2500 HD, 3500, and 3500 HD (6.6L Duramax LLY / LBZ / LLM).

The Diamond Eye Turbo-Direct downpipe is engineered to replace the restrictive factory pipe, significantly improving exhaust flow and reducing backpressure directly from the turbocharger. Constructed from 3-inch aluminized steel, this component is fabricated using precision CNC mandrel bending to ensure smooth transitions and consistent tubing diameters. This design helps lower exhaust gas temperatures (EGTs) and improve turbo spool-up response, providing a more efficient path for spent gases to exit the engine.

• Manufacturer Part Number: 321056
• Diameter: 3.0 Inches
• Material: Aluminized Steel
• Construction: CNC Mandrel-Bent
• Fitment: LLY, LBZ, and LLM 6.6L Duramax diesel engines
• Installation: Replaces OEM turbo-direct pipe

Fits 2001-2007.5 Chevy and GMC 2500/3500 trucks (6.6L).

This Diamond Eye 4-inch single tailpipe first section is engineered specifically for off-road configurations, serving as a critical component in cat-back or downpipe-back exhaust setups. Constructed from durable aluminized steel, this pipe is CNC mandrel-bent to ensure a consistent diameter throughout the bend, minimizing backpressure and optimizing exhaust flow for the Duramax diesel engine. This section replaces or completes the first part of the tailpipe assembly in Diamond Eye performance exhaust systems.

• Material: CNC mandrel-bent 4-inch aluminized steel tubing for corrosion resistance and flow efficiency.
• System Context: Designed for use with single-exit off-road cat-back or downpipe-back kits.
• Bending: Precision mandrel bends maintain a 4" OD to prevent restriction.
• Compatibility: Direct-fit component for 2001-2007.5 GM 2500 and 3500 HD chassis.
• Manufacturer Part Number: 321051

Fits select 1994-2002 Dodge Ram trucks equipped with HX40 turbochargers.

This Diamond Eye 4-inch downpipe kit is engineered to maximize exhaust flow and reduce backpressure in your diesel application. Designed specifically for the HX40 turbo-direct flange, this kit replaces restrictive OE piping with high-flow aluminized steel tubing. Every component is CNC mandrel-bent to ensure a consistent diameter through every curve, preventing the turbulence and EGT buildup common in crush-bent alternatives.

Built by specialists in Eastern Oregon, Diamond Eye exhaust components utilize precise fabrication parameters to ensure a perfect fit. This kit provides a durable, cost-effective solution for diesel owners looking to optimize their turbocharger's performance and longevity.

• Manufacturer Part Number: 221043
• Tubing Diameter: 4.0 inches
• Material: High-quality Aluminized Steel
• Connection Type: HX40 Turbo-Direct Flange
• Included Hardware: Heavy-duty V-Band Clamp
• Construction: Precision CNC mandrel-bent tubing

Fits 1994-2002 Dodge Ram 2500 and 3500 models (5.9L).

The Diamond Eye 221040 turbo-direct downpipe is a high-flow exhaust component designed to replace the restrictive factory downpipe. Constructed from 4-inch OD mandrel-bent aluminized steel, this pipe ensures maximum exhaust gas velocity and reduced backpressure, which helps lower exhaust gas temperatures (EGTs) and improves turbocharger efficiency. This specific model is designed for setups requiring an HX40 turbo-direct flange connection.

• Manufacturer Part Number: 221040
• Diameter: 4-inch OD
• Material: Aluminized Steel
• Turbo Flange: HX40 Turbo-Direct Flange
• Construction: Mandrel-bent for optimal flow characteristics
• Configuration: Single turbo-back downpipe component

Fits select 1994-2007.5 Dodge Ram 2500 and 3500 trucks (5.9L).

This Diamond Eye 4-inch tail pipe is a second-section component designed for single exhaust configurations, whether used in a turbo-back or cat-back system. Precision-engineered using CNC mandrel-bending technology, this pipe maintains its full 4-inch diameter through every curve to ensure maximum exhaust flow and reduced backpressure.

Constructed from durable aluminized steel, this tail pipe offers a cost-effective solution for replacing a worn factory component or completing a custom performance exhaust build. The mandrel-bent design provides superior flow characteristics compared to standard press-bent alternatives, helping your 5.9L Cummins diesel breathe more efficiently.

• Diameter: 4-inch OD
• Material: Aluminized Steel
• Configuration: Single Exhaust, 2nd Section
• Manufacturing: CNC Mandrel Bent for optimal flow
• Part Number: 221005

Fits 1994-2007.5 Dodge Ram 2500 and 3500 (5.9L).

Replace a restricted or damaged exhaust component with this Diamond Eye 4-inch first-section tail pipe. Designed for single exhaust configurations, this pipe is manufactured using CNC mandrel-bending technology to ensure consistent diameter throughout every curve. This process eliminates the restrictive necking found in standard crush-bent piping, allowing for improved exhaust flow and reduced backpressure in your Cummins-powered Dodge.

• Part Type: Exhaust Tail Pipe (1st Section)
• Diameter: 4-inch OD
• Material: Aluminized Steel
• Construction: CNC Mandrel-Bent
• Fitment: Turbo-Back or Cat-Back Single Exhaust Systems
• Manufacturer Part Number: 221004

Fits 1989-1993 Dodge W250 and W350 4WD models (5.9L).

Improve exhaust flow and reduce EGTs in your first-generation Cummins with the Diamond Eye 4-inch aluminized turbo-back downpipe. This downpipe is engineered specifically for 4x4 configurations, providing the necessary clearance for drivetrain components while replacing the restrictive factory piping. Using CNC mandrel-bending techniques, Diamond Eye ensures consistent pipe diameter throughout every bend to minimize backpressure and maximize performance.

This single downpipe is designed with an HX40-style flange, making it a required upgrade for trucks equipped with HX40 turbochargers. Built from durable aluminized steel, it offers a reliable, cost-effective solution for high-performance exhaust routing on early 12-valve Cummins diesel engines.

• Manufacturer Part Number: 220105
• Material: Aluminized Steel
• Diameter: 4 Inches
• Turbo Flange: HX40 Style
• Configuration: Turbo-Back (TB) Single Downpipe
• Drive Type: 4x4 (4WD) Only
• Manufacturing: CNC Mandrel-Bent Tubing

Fits 1989-1993 Dodge D250 and D350 Base models (5.9L). This downpipe is specifically engineered for 2WD (2x4) drivetrain configurations only.

Replace your restrictive factory component with this Diamond Eye 4-inch aluminized steel downpipe. Designed for performance and durability, this pipe features a specialized HX40 turbo flange to accommodate upgraded turbocharger setups. Each unit is manufactured using precision CNC mandrel bending to ensure smooth exhaust gas flow and a precise fit within the engine bay of your first-generation Dodge Cummins truck.

• Part Type: Turbo-Back Single Downpipe
• Material: Aluminized Steel
• Diameter: 4.0 Inches
• Flange Type: HX40
• Drivetrain Compatibility: 2WD Only
• Manufacturer Part Number: 220104