DIAMOND EYE K4211S TURBO BACK EXHAUST 4 INCH FOR 89-93 DODGE 5.9L CUMMINS DODGE RAM 2500/3500 4X4 STAINLESS

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