Potential Horsepower Gain of Long Tubes with Factory Cats?

1032 Views 4 Replies 5 Participants Last post by charlie_gonzales, May 12, 2014

GBrown1320

Discussion Starter · May 6, 2014

I have read about the considerable power gains from long tube headers on these trucks. However, I am curious as to how much of those gains may be attributed to the additional exhaust flow of an off road y-pipe or high flow cats? I have been considering installing LTs, but I would be reusing my stock converters, whether in a shortened factory Y or welded into an O/R Y. How much power do you guys think could be gained from LTs while retaining factory converters?

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garnerZ71

· #2 · May 7, 2014

I believe 20 lb ft and 20 hp is around the standard gained. With cats or without I'm not sure the effect.

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