HOW MUCH HP DOES A CATBACK ADD TO A 3.8L??

 

none.

 

aight alright, i put on the flow master 80 series cat back on my 3.8 and it didnt make any noticable h/p just a little noise..............

 

on dyno a a true catback installed correctly will be close to 10-11 horse power to the wheels

 

I'm not sure killing a cat is worth the gain? Animal rights fines are heavy.

 

just let curiousity do it

 

Popular hot-rodding tested the flowmaster 2.5" american thunder and it gained 12 rwhp on the dyno...

that varies tho, i really dont think it will add that much but if you do a complete exhaust (headers, high flow cat, spipe, catback) i would think to see 15 hp at least to the rear wheels

 

not much gain, but it dont do no good when you run that 3.8 up on the median :-D, jp wit ya

 

My Borla sure helped my MPG, anyway...