I had a airaid throttle spacer k&n filter borla catback and jet chip stage 2 on my old jeep wrangler.
Noticed big milage and power difference.
Sold the wrangler for a hummer and ordered matching parts.
BUT..
I like the whistle from the spacer. The rumble from the k&n and the drone from the catback. Stage 2 chips requires higher octane fuel use.
WORTH IT.

 

Please do not post in 2 year olds threads. We call it resurrection from the dead.

Thank you.