Product Description
DIAMOND EYE K4234A-RP is a 4" aluminized muffler-delete cat-back for 2004.5–2007.5 Ram 2500/3500 5.9L Cummins (all cabs/beds). It replaces the factory cat-back with free-flowing mandrel bends for lower EGTs and a stronger, classic diesel note—without a muffler for maximum tone and minimal backpressure.
FAQ: WILL THIS FIT MY TRUCK?
Yes—if you have a 2004.5–2007.5 (Common Rail 5.9L) Ram 2500/3500. It installs behind the factory catalytic converter (cat-back). Not for early-2004 (’03–’04) trucks. Verify your model year and emissions layout before ordering.
FAQ: DOES IT INCLUDE A MUFFLER?
No. The -RP variant is the muffler replacement (straight-pipe) version for a louder, more aggressive sound. If you prefer a quieter setup, see the K4234A (with muffler).
FAQ: STAINLESS OR ALUMINIZED?
This kit is aluminized steel for value and durability. For stainless options, see Cross-Reference below.
Fitment Details
- Vehicle: 2004.5–2007.5 Dodge Ram 2500/3500, 5.9L Cummins (all cabs/beds)
- Layout: 4" cat-back, single side exit; bolts up behind the factory catalytic converter
- Emissions Note: Retains the OE catalytic converter (cat-back configuration)
Cross-Reference / Alternatives (MBRP-Only)
- 4" Aluminized cat-back w/ muffler (same years): MBRP S6108AL
- 4" T409 stainless cat-back (same years): MBRP S6108409
- 5" Aluminized cat-back (more flow, same years): MBRP S61180AL
- 5" Aluminized cat-back, no tip (same years): MBRP S61180P
- 5" Aluminized cat-back, no muffler (loudest alt.): MBRP S61180PLM
Specifications
| Brand | Diamond Eye Performance |
|---|---|
| MPN | K4234A-RP |
| UPC | 841963104233 |
| GTIN | 0841963104233 (UPC-A) |
| Tubing Diameter | 4.0" |
| Exit | Single Side |
| Material | Aluminized Steel |
| Configuration | Cat-Back, No Muffler |
| Package Dimensions | 52" x 21" x 12" |
| Shipping Weight | ~51 lb |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |
