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hey so i had this big argument with my boss the other day. he said cat back exhaust def will increase horsepower like 30hp. And i say all it does is give it a good sound and better gas mileage, and a few horses maybe. i say its obviously headers and high flow catt. what do you guys say

 

thanks

JAY

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Crank it might be like 15-20 chp.

 

Most have seen gains of about 10 whp when tuned for it. But you also get more more mid range power, a little quicker spool, and yeah sound :)

 

I bet a free flowing exhaust could also net you 1-2 mpg if you are not romping it all the time to hear the new sounds :)

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it wont do much at all just catback alone.

 

there are also those really restrictive cats in the downpipe. unless you get rid of those first, a catback will barely do anything at all.

 

if let's say you had a catless downpipe and a stock exhaust first, then your exhaust is the one thats being restrictive.. once you open up the exhaust, then you'll probably net a ton of power. but until then a catback is purely looks, sound, and barely any power.

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