Hey all, i have a quick exhaust question that i cant seem to find the answer to.

i love my oem exhaust(03 coupe) like most people do, but i am looking for some gains in the exhaust department, i was considering using my stock exhaust with a y-pipe and test pipe combo on my stock exhaust.


i know the y pipe and cats are the most restricted parts on my stock exhaust, so i guess my question is how much gain difference will there be if i go with a y-pipe and test pipes on my stock exhaust, and will there be even a great gain if i get a catback on top of the y-pipe and test pipes?

i assume the y-pipe and test pipe combo on stcok exhaust is good for about 7hp

and i also assume the y-pipe, test pipe, and catback combo would be good for about 10hp.


is this close to accurate? or is the catback going to give me even more then what i am thinking?

also how much power do headers add on our cars with the above comparrisons?

 

Headers don't do much at all unless ur FI. I would say just y-pipe and test pipes. I love the sound of our stock exhaust, I just want to amplify it, thats why Im going with just hose two, and cheaper than getting a new exhaust. I do love the sound of HKS tho.

 

dont forget about getting a tune after those parts are installed!

 

 

^only thing i dont like about that setup is the slight raspy sound at the end. other than that me likey long time hhaa

 

Has any one remove the oem resonetor, would it make the OEM sound louder?

 

MY vid is SOOOO much better..

 

that sound good!!