Product Description
DIAMOND EYE K4211S is a 4.0" T409 stainless steel turbo-back exhaust system for 1989–1993 Dodge/Ram 2500 & 3500 5.9L Cummins 4x4 trucks. It replaces the factory system from the turbo outlet back to improve flow, lower EGTs, and sharpen throttle response while delivering a deep, classic 1st-Gen tone. Stainless construction provides excellent corrosion resistance for daily drivers and work trucks alike.
Application scope per manufacturer: 1989, 1990, 1991, 1992, 1993 Dodge 5.9L Cummins 2500/3500, all cab/bed lengths, 4x4 only (turbo-back, single side exit).
Fitment Details
- Years/Platform: 1989–1993 Dodge/Ram 2500/3500, 5.9L Cummins, 4WD only
- Configuration: 4" turbo-back, single side exit
- Material: T409 stainless steel
- Downpipe: Includes turbo downpipe; HX40-flange downpipe option exists on select variants—verify your turbo outlet before ordering
FAQ: WILL THIS FIT 2WD?
No. This kit is designed for 4x4 models only due to routing/clearance. For 2WD systems, see our MBRP alternatives linked below.
FAQ: IS THIS REALLY STAINLESS?
Yes—this system is constructed from T409 stainless steel for strong corrosion resistance and long service life in harsh climates.
FAQ: DO I NEED TUNING?
No tuning is required. This is a bolt-on exhaust system. Always comply with local emissions laws.
Cross-Reference / Alternatives (MBRP-only, on cppdiesel.com)
- MBRP S6150409 — 4" T409 stainless, turbo-back, single side exit, 4WD.
- MBRP S6150P — 4" aluminized, turbo-back, single side exit, 4WD.
- MBRP S6150PLM — 4" aluminized, turbo-back, no muffler, 4WD.
- For 2WD applications: MBRP S6148AL (4" aluminized, turbo-back, single side exit).
Specifications
Brand | Diamond Eye Performance |
---|---|
MPN | K4211S |
UPC | 841963103281 (common for K4211S-RP variant) |
GTIN | 841963103281 (GTIN-12 / UPC-A) |
Material | T409 Stainless Steel |
System Type | 4" Turbo-Back, Single Side Exit |
Vehicle Fit | 1989–1993 Dodge/Ram 2500/3500 5.9L Cummins, 4x4 only |
Shipping Weight | ~66 lb (varies by packaging) |
Package Dimensions | Approx. 52" x 21" x 13" |
Emissions/CARB | Not CARB-exempt; for off-road/where legal |
Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov |