1998 5.7 Fuel Mileage, Exhaust, and Header Questions
#1
1998 5.7 Fuel Mileage, Exhaust, and Header Questions
I'm restoring my 1998 Z71 5.7 5-speed extended cab truck. I switched to 235/85/16 tires and I'm getting ready to replace the exhaust system. In doing this, I'm also in the search to the highest fuel mileage possible as a personal project. I've decided to go with a Flowmaster cat back system, but I'm looking for input on single or dual exhaust? Also, which brand of shorty headers would work best. Of course I want it to sound good, not terribly concerned about a power increase, but looking to increase mileage for shirt trips out of town. And has anyone done any computer/chip upgrades that effect mileage? Any input would be appreciated.
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country_09
Silverado, Sierra & Fullsize Pick-ups
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February 24th, 2011 6:52 AM