What material is this exhaust system made from?

This Diamond Eye exhaust system is constructed from stainless steel. This material is chosen for its strength and resistance to rust and corrosion, which is important for the longevity of your exhaust system.

What is the benefit of CNC mandrel bending?

CNC mandrel bending ensures that the exhaust tubing maintains a consistent diameter throughout all the bends. This smooth, uninterrupted flow helps reduce backpressure and improves exhaust efficiency compared to crush bending methods.

Does this kit include everything needed for installation?

This is a complete turbo back exhaust system kit, meaning it includes all components from the downpipe back to the tailpipe. It is designed to replace your factory exhaust system in its entirety.

Diamond Eye KIT 4in Turbo Back Single SS DDG4X4 89-93 Dodge 5.9L Cummins 2500/3500

Specifications

Brand: Diamond Eye Performance
Part #: K4211S-HX40
UPC: 841963120325

Diamond Eye KIT 4in Turbo Back Single SS DDG4X4 89-93 Dodge 5.9L Cummins 2500/3500

Name: Diamond Eye KIT 4in Turbo Back Single SS DDG4X4 89-93 Dodge 5.9L Cummins 2500/3500
Brand: Diamond Eye Performance
Price: 797.54 USD
Availability: InStock

$797.54

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 1989-1993 Dodge W250. This 4-inch stainless steel turbo back exhaust system improves exhaust flow for your 5.9L Cummins.

Key Features

Fits 1989-1993 Dodge W250 and 1989-1993 Dodge W350 with the 5.9L Cummins engine.
Constructed from durable stainless steel to resist corrosion and ensure longevity.
Features a 4-inch diameter for improved exhaust gas flow.
Includes a single muffler for a deeper exhaust tone.
Designed as a turbo back system, replacing the exhaust from the turbocharger to the tailpipe.
Utilizes CNC mandrel bending for smooth, consistent tube diameter and optimal flow.

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Fits these vehicles

Dodge W250 1989-1993
Dodge W350 1989-1993

Product Details

This 4-inch turbo back exhaust system from Diamond Eye is built for your 1989-1993 Dodge W250 or W350 with the 5.9L Cummins engine. It's constructed from stainless steel, which means it's going to hold up well against rust and corrosion, especially important for a truck that sees regular use. The system replaces your factory exhaust from the turbocharger all the way back, designed to improve how efficiently exhaust gases can exit your engine.

Diamond Eye uses CNC mandrel bending for this kit, which is a big deal because it ensures consistent tube diameter throughout the bends. This helps maintain smooth exhaust flow, reducing backpressure compared to crush bends. The single muffler design is intended to give your Cummins a deeper exhaust note while still managing sound levels. This kit is specifically designed to fit with an HX40 turbocharger, ensuring proper alignment and connection points.

When installing this system, you'll be working with a complete turbo back setup, meaning it includes everything from the downpipe back to the tailpipe. This comprehensive approach ensures all components are designed to work together for optimal performance and fit. Keep in mind that this system is not CARB approved and cannot be shipped to California.