Product Description
DIAMOND EYE 220105 is a 4.0" aluminized-steel turbo downpipe with an HX40-style turbine outlet flange engineered for the 1989–1993 Dodge Ram 2500/3500 5.9L Cummins 4x4. It reduces backpressure, improves spool, and provides a clean transition from turbo to exhaust for stronger mid-range pull.
Fitment Details
- Vehicle: 1989–1993 Dodge Ram 2500/3500 5.9L Cummins, 4x4 only (all cab/bed lengths)
- Turbo outlet: HX40-style V-band flange
- Pipe size: 4.0" (aluminized steel)
- O2 bung: Not included
Cross-Reference / Related Diamond Eye Parts (on CPP Diesel)
- 220100 – 3" Downpipe, 89–93 Cummins 4x4
- 220104 – Downpipe, 89–93 Cummins 2x4
- 220099 – 4" Downpipe, 89–93 Cummins 2x4
- K4211S – 4" Turbo-Back System, 89–93 Cummins 4x4 (Stainless)
FAQs
WILL THIS FIT MY 1ST-GEN CUMMINS?
Yes—if you have a 1989–1993 Ram 2500/3500 5.9L 4x4 and an HX40-style turbine outlet. It does not fit 2x4 models (see 220099/220104).
DOES IT INCLUDE AN OXYGEN SENSOR BUNG?
No. This pipe is supplied without an O2 bung.
WHAT MATERIAL IS USED?
Aluminized steel for durability and value. Stainless options are available in full systems.
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| Part Number (MPN) | 220105 |
| UPC | 841963113426 |
| GTIN | 0841963113426 (UPC-A) |
| Configuration | Downpipe, HX40 flange, 4.0" diameter |
| Material / Finish | Aluminized steel |
| Vehicle Fitment | 1989–1993 Dodge Ram 2500/3500 5.9L Cummins, 4x4 only |
| Package Dimensions | 53.00" L × 13.00" H × 9.00" W |
| Shipping | Free Shipping (standard ground) |
| Country of Origin | USA (per manufacturer/retailer listings) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
