Guys Ive just read this post by andyastra16v
im not expecting any great gains, just a few more bhps, torques, and to hear the sound of my engine breathing.
been thinking of upgrading my the stock intake and exhaust. I have in mind the K&N 57i cone and a ?cat back, to start off with.
Should i only bother with derestricting the box and using a panel filter? (also adding the vectra intake perhaps) is just a cat back good to start off with?
As ive never tried upgrading such things on a car, im not familiar with the complications that can occur here. Can anyone give any helpful information about the kind of problems to watch out for? e.g urgent need of remapping..