Quote Originally Posted by bentusi123 View Post
so, u mean i keep the stock catback? does the catback increase power?
i have the same idea as well. cuz catback cost me too much to spend.
i just decide get injen intake and header.
but the "hissing" looks so strange. i think i need time to used to it.
should i change to other header if i have chance?
The increase power from cat back is minimal. The catback on the stock CL9 is optimal. Change your cat, that will give u some more gains. Go either magnaflow or rt cat
To get rid of the hissing, change the flex pipe. It doesnt cost that much. Im waiting for my topspeed header to arrive as well. Im just gonna change the flex pipe straight away to avoid any complications or issues with hissing.
Swap the flex pipe to a 2" x 6" double braided flex pipe as mentioned by Tony.
Im not sure where to source it from. Tried ebay but not much success. Anyone know?