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Old 11-19-2016, 08:59 AM   #17
Ski-me
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Join Date: May 2012
Location: Colo Springs, CO
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Re: thinking about getting this in the morning

Quote:
Originally Posted by schpeen View Post
Still have the original exhaust with catalytic converter! the truck starts up immediately and runs very smooth and quiet so I am apprehensive to replace with headers on back with a more free flowing dual setup. I assume the stock 5.7 has throttle body which would be computer controlled somewhat so it will automatically adjust itself to a new exhaust??
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Realistically, you're not going to gain much with this engine and headers/exhaust modifications. It's just not a high horsepower rig to start with. I'd keep the stock manifolds and do a cat back type system. I installed a Flowmaster muffler and tailpipe system.

https://smile.amazon.com/Flowmaster-...9%3AFlowmaster
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89' K5 Blazer, 2.5" lift, 35" tires
04' GMC Yukon XL, 3/4 ton, 8.1L
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