Product Description
DIAMOND EYE K4209S-RP is a 4.0" T409 stainless turbo-back exhaust system engineered for the first-gen 1989–1993 Dodge Ram 2500/3500 2x4 with the 5.9L 12-Valve Cummins. This kit replaces the factory system with a freer-flowing single side-exit design and includes a muffler replacement pipe for an aggressive, straight-through sound profile.
FAQ: WILL THIS FIT MY TRUCK?
Yes—if you own a 1989–1993 Dodge Ram 2500/3500 2WD (2x4) with the 5.9L Cummins, this kit is designed for your chassis and wheelbase range. For 4WD applications, see the MBRP alternatives linked below.
FAQ: DOES IT INCLUDE A MUFFLER?
No. The RP in K4209S-RP indicates a muffler replacement (straight-pipe) section for maximum flow and sound. If you prefer a quieter setup, choose a compatible 4" Diamond Eye muffler from our 1989–1993 category.
FAQ: IS THIS CARB LEGAL?
This system is not CARB legal and is intended for use on vehicles outside of California or on off-road/competition vehicles where permitted.
Fitment Details
- Vehicle: 1989–1993 Dodge Ram 2500/3500 (D/W Series), 2WD (2x4) only
- Engine: 5.9L Cummins 12-Valve (VE-pump)
- Configuration: 4.0" turbo-back, single side exit, includes downpipe and straight-through "muffler replacement" section
- Material: T409 stainless steel
Cross-Reference / Alternatives (MBRP-only)
- 2WD Aluminized Alternative: MBRP S6148AL 4" Turbo-Back, Single Side Exit, 1989–1993 Dodge 2WD
- 4WD Aluminized Alternative: MBRP S6150AL 4" Turbo-Back, Single Side Exit, 1988–1993 Dodge 4WD
- 4WD T409 Stainless Alternative: MBRP S6150409 4" Turbo-Back, Single Side Exit, 1988–1993 Dodge 4WD (T409)
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4209S-RP |
| UPC | 841963103151 |
| GTIN | 0841963103151 (UPC-A) |
| System Type | 4.0" Turbo-Back, Single Side Exit |
| Material | T409 Stainless Steel |
| Includes Muffler? | No — Muffler Replacement (straight-through) |
| Vehicle Fit | 1989–1993 Dodge Ram 2500/3500 2WD (2x4), 5.9L Cummins |
| Shipping Weight | ~69 lb |
| Package Dimensions | ~52" x 21" x 13" |
| CARB Status | Not CARB legal (not for sale or use in CA on pollution-controlled vehicles) |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
