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Exhaust› Exhaust Pipes, Systems and Components

Diamond Eye Performance

Diamond Eye KIT 4in TB HX40 DWNP W/ V-Band SGL AL: 2-WHEEL DRIVE ONLY 89-93 DODGE CUMMINS 5.9L

$1,137.53 $450.49 Save $687.04

SKU: D005 K4209A-HX40

In Stock
In Stock
Ships by Aug 10
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

Part #: K4209A-HX40

MIA's Description

This Diamond Eye Performance exhaust system is designed for 1989-1993 Dodge 5.9L Cummins Diesel 2500/3500 2WD trucks. It features 4-inch aluminized, mandrel-bent tubing for maximum flow, increasing horsepower and torque, improving fuel economy, lowering EGTs, and providing an aggressive sound. It is a direct bolt-on kit that utilizes OEM hangers. This system is specifically designed for vehicles with aftermarket turbos using an HX40 style downpipe and is not compatible with factory turbos. It comes with a 1-year limited warranty on aluminized kits and is made in the USA.

Fitment

Fitment Guaranteed

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

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Specifications

BrandDiamond Eye Performance
Part NumberD005 K4209A-HX40

Videos

4 inch Diamond Eye Exhaust Install

4 inch Diamond Eye Exhaust Install
DIAMOND EYE 4" Exhaust Comparison Resonator vs muffler CUMMINS12v not 24v only Dodge Ram

DIAMOND EYE 4" Exhaust Comparison Resonator vs muffler CUMMINS12v not 24v only Dodge Ram

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.

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