Sale

Exhaust› Exhaust Pipes, Systems and Components

Diamond Eye Performance

Turbo Back Exhaust 1989-93 Dodge 5.9L Cummins Dodge RAM 2500/3500 2X4 4 Inch Stainless Turbo Back Single Muffler Replacment

$1,144.00 $584.48 Save $559.52

SKU: D005 K4209S-RP

In Stock
In Stock
Ships by Jun 20
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

This Diamond Eye Performance K4209S-RP exhaust system is a turbo-back, no-muffler design, made from 4" 409 stainless steel. It features 4" mandrel-bent tubing for maximum flow, leading to increased fuel economy, lower EGTs, increased horsepower and torque, and an aggressive sound. It is a direct-fit, easy bolt-on kit that utilizes OEM hangers and is proudly Made in the USA. Comes with a 6-year limited warranty for stainless steel kits.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandDiamond Eye Performance
Part NumberD005 K4209S-RP

Videos

Diamond Eye 4" Exhaust with Muffler Install - Before & After Sound

Diamond Eye 4" Exhaust with Muffler Install - Before & After Sound
4in Exhaust Install & Review | DIAMOND EYE | 5.9 CUMMINS

4in Exhaust Install & Review | DIAMOND EYE | 5.9 CUMMINS
MBRP vs Flo-Pro vs Diamond Eye | 1st Gen Cummins Exhaust Comparison

MBRP vs Flo-Pro vs Diamond Eye | 1st Gen Cummins Exhaust Comparison
1989 Ram D250 Cummins Turbo Diesel | Retro Review

1989 Ram D250 Cummins Turbo Diesel | Retro Review
Double the Horsepower 1st Gen Cummins

Double the Horsepower 1st Gen Cummins
Installing New A/C Compressor | 89-93 Dodge D250 Cummins

Installing New A/C Compressor | 89-93 Dodge D250 Cummins
Buying a 1st Gen Cummins? WATCH THIS FIRST!!!

Buying a 1st Gen Cummins? WATCH THIS FIRST!!!
Watch before you buy a First Gen Cummins! (10 things to know)

Watch before you buy a First Gen Cummins! (10 things to know)
How To Solve All Your Wiring Issues On A 1st Gen. Dodge Ram Cummins

How To Solve All Your Wiring Issues On A 1st Gen. Dodge Ram Cummins
1993 Dodge D350 5.9 12 valve Cummins W/53,000 Original Miles!

1993 Dodge D350 5.9 12 valve Cummins W/53,000 Original Miles!
How To Replace Worn Lift Pump | 1989-1993 Dodge Cummins

How To Replace Worn Lift Pump | 1989-1993 Dodge Cummins
1981-1993 Dodge Ram LED headlight upgrade (91 Dodge Ram Cummins Truck)

1981-1993 Dodge Ram LED headlight upgrade (91 Dodge Ram Cummins Truck)

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy