Mufflex OR pipes...HP gain?
04-18-2005, 12:41 PM
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Mufflex OR pipes...HP gain? Anyone ever dyno a '01-'02 LS1 Fbod before and after installing Mufflex off-road pipes? How much horsepower gain? Anyone? Thanks. WJ
04-18-2005, 01:54 PM
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I had those for a short while when I had stock manifolds before buying headers. I never dyno the car with them, but I did notice a consistent 1/2mph gain over the stock cats at the track. Virtually no et reduction, maybe .05 reduction. I have the Hooker catback....car was alot louder and raspier. This is of course just one example, others may have had better results.
