What's next?
 

I just got my borla exhaust and injen CAI installed. I love them both. The exhaust has a nice deep growl to it that doesn't make my car sound like an overmodded civic. The CAI hisses like I'm running turbo (especially at about 3K rpm's). What I want to know is what mod would help me capitalize on the two I already have. I was thinking of headers next. Any suggestions?

Plenum or Plenum spacer... :)

or you can do plenum AND HFC... :cool:

yea i love the hisses of my injen, its so sick it really does sound like a turbo around 3k...........i would either get some headers, high flow cats, or plenum to top it all off