i have a corsa exhaust, and i am going to hook up my CA header this weekend...
i thought that if i just bought a high flow cat and had a muffler shop get pipe and weld it on the cat i would have a downpipe for cheeper than 200 bucks or so...
so i went to the muffler shop and the guy told me that there is no gains in changing the downpipe, that i would get no extra power!!!
is this true??
if i got gains would it be worth the $250 CA wants??

 

a header/ dp combo is "supposed" to yeild anywhere from 10-40 hp depending on other mods...

 

does the downpipe make much of a difference or is most of the hp gain with the header??

 

it all works hand in hand with one another. the more air u can get through your motor the better

 

Get it and stop being a cheap ass

Really helps up top...

 

it wont be much of a gain but you will get maybe 5-10 hp

 

should i get an XTC downpipe or just buy a high flow cat and have a muffler shop weld on some piping and a flex pipe??

 

just buy the downpipe..ull get better gains with a header and downpipe..get both at the same time..makes install easier....lol