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...
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From: dave m.

Great product! My engine breathe better,egt is lower,turbo spool up is faster. The engine runs just great! And the sound is awesome :)
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From: Leif Ove N.