My brother and i got the exhaust on in about a half hour untill we realized that it did make a difference which way the muffler went in (should have read all the instructions). immidatly i noticed that the truck is more snappy and responsive i love the... ...read more From: Josh R.
I installed your 4 inch exhaust, k&n air filter, and new vacuum pump on my 2000 GMC 3500 duelly crew cab. It immediatly lowered the engine temp, and it's the first time I really ever heard the turbo. I did the install, quite simple and straightforward. I... ...read more From: dave m.
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