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Diamond Eye Performance

Diamond Eye Standard Aluminized Exhaust: K4209A
Muffler Replacement Aluminized Kit: K4209A-RP

Diamond Eye Exhaust

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Fits: 89-93 Dodge 5.9L 2500/3500 Diesel
Diamond Eye 4" Aluminized Turbo Back Single

Diamond Eye Part # K4209A (Standard Kit)
Diamond Eye Part # K4209A-RP (Muffler Replacement Kit)
Installation Instructions pdf

Thoroughbred Diesel is an your source for Diamond Eye diesel exhaust kits. Shop Thoroughbred Diesel for Diamond Eye Exhaust kits, and Muffler Replacement kits for your Cummins 89-93 Dodge 5.9L 2500/3500 Diesel. We are a authorized dealer of Diamond Eye so if you do not see the Diamond Eye product listed for your diesel truck, stop clicking and call us toll free at 866-737-4966.

  • All Diamond Eye standard kit exhaust systems (stainless or aluminized) come with a T409 stainless steel muffler!!

Fits Cummins: 1989-1993 Dodge 5.9L Diesel 2500/3500 (all cab and bed lengths)
4" Aluminized Turbo Back Single

Did you know by upgrading your exhaust system you will reduce EGT's and increase horsepower, and even increase fuel mileage by reducing backflow restrictions? Diamond Eye Performance Diesel Exhaust System is just the thing you need to add good looks, increase performance and lower EGTs.

The goal of Diamond Eye is to create a free-flowing pipe to extract exhaust gases that minimize horsepower reductions. Simply put -- Bigger pipes work better! Most diesel pickup's stock exhaust systems range from 3 to 3.5 inches in diameter, which is much less efficient than Diamond Eye's 4-inch and 5-inch diameter pipes. Their CNC mandtdrel-bending machines and support equipment allow them to fabricate non-restrictive, free-flowing systems that your diesel engine will profit by. Diamond Eye affords you the choice of standard and muffler replacement kits (RP) in 3.5 in. up to bigger and better 5.0 in. systems, in either economical 16-gauge aluminized steel or longer-lasting, good looking 409 stainless steel.

Diamond Eye exhaust systems come in a kit that includes the necessary clamps, hangers and brackets that are prearranged for easy installation. Diamond Eye exhaust systems can be installed in a little over an hour.

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Standard Exhaust Kits: (ALUMINIZED)
1989-1993 Cummins 5.9L 2x4 2500/3500 4" Turbo back single Kit
# K4209A
Muffler Replacement Kits: (ALUMINIZED)
1989-1993 Cummins 5.9L 2x4 2500/3500 4" Turbo back single Kit
# K4209A-RP
Thoroughbred Diesel logo glowing Thoroughbred Diesel Performance and Repair Shop
4843 Rockwell rd.
Winchester, KY 40391
Call Toll Free: 1-866-737-4966

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