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SKU: 221040 | UPC: 841963113679
Diamond Eye Downpipe 4in TB Single HX40 Turbo Direct Flange Aluminized Dodge 5.9L Ram 2500/3500 94-02
This Diamond Eye 4-inch downpipe delivers direct replacement for stock exhaust on 1994-2002 Dodge Ram 2500 and 3500 trucks with 5.9L Cummins diesel and single HX40 turbo. Mandrel-bent aluminized steel construction replaces restrictive factory piping from turbo outlet to crossover pipe for faster exhaust flow and quicker turbo spool. Expect gains in horsepower torque and engine efficiency with this bolt-on upgrade built for daily driving and heavy towing.
Key Features
- Mandrel Bent Design: Smooth continuous bends preserve exhaust velocity minimize turbulence and support high-flow performance
- 4-Inch Diameter Tubing: Expands flow capacity over stock 3-inch pipe to cut backpressure and improve power delivery across RPM range
- Aluminized Steel Build: Thick corrosion-resistant coating withstands heat rust and road conditions for extended service life
- HX40 Turbo Direct Flange: Precision-machined flange bolts straight to Holset HX40 turbo outlet no adapters or cutting required
- TB Single Configuration: Turbo-to-crossover layout ensures leak-free seals with v-band or clamp connections for reliable fit
Product Notes
- Confirm HX40 turbo and 5.9L Cummins engine before purchase for perfect match
- Inspect gasket surfaces during install to prevent exhaust leaks
- Packages in protective box weighs 25 lbs ships via UPS Ground
Installation Notes
- Professional installation recommended.
- Cut and remove stock downpipe heat shield may require basic welding tools
- Includes gaskets and hardware for turbo flange and outlet connections
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1994-2002 | Dodge | Ram 2500 Pickup | 5.9L Diesel |
| 1994-2002 | Dodge | Ram 3500 Pickup | 5.9L Diesel |
Why Choose Diamond Eye?
- Operates 60,000 sq ft facility with CNC mandrel benders for precise tubing from 3/8in to 5in
- Equips R&D center with dyno testing to refine exhaust designs for real-world gains
- Maintains massive warehouse stock for same-day shipping on performance parts
Frequently Asked Questions
-
Q: Will this downpipe fit my 1998 Dodge Ram 3500 5.9L with HX40 turbo?
A: Yes fits all 1994-2002 Ram 2500/3500 5.9L Cummins with single HX40 turbo direct bolt-on from turbo to crossover -
Q: What material and thickness does it use?
A: 16-gauge aluminized steel tubing with full interior and exterior coating for superior heat and corrosion protection -
Q: What warranty coverage applies?
A: Lifetime structural warranty plus 1-year finish warranty covers manufacturing defects under normal use
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Secure cardboard box 48in L x 12in W x 12in H
- Weight: 25 lbs
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Diamond Eye Performance manufactures mandrel-bent exhaust systems and components for diesel trucks, with a catalog that spans DPF-back, turbo-back, and cat-back exhaust for Cummins, Duramax, and Power Stroke platforms. CNC mandrel bending maintains full internal tube diameter through bends from 3/8-inch to 5-inch OD in both aluminized and stainless steel, ensuring exhaust gas flow is not restricted by collapsed bends common in lesser exhaust systems.Popular UpgradesDiamond Eye 4-inch DPF-back exhaust systems for the Cummins 6.7L and Duramax 6.6L diesel trucks are the most popular products, providing a meaningful reduction in exhaust restriction over the factory 3.5-inch outlet section. Stainless steel mandrel-bent kits are available for the Ram 2500, Ram 3500, Ford Super Duty, and GM HD truck platforms with direct-fit connections and tip options. Aluminized exhaust kits offer the same mandrel-bent quality at a lower price point for builds in drier climates where corrosion is less of...
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