Originally Posted by
dougie_504
Key words here are 'noticeable performance gains'.
Proper cold air intake and full exhaust (header/hi-flow cat/cat-back + muffler) sure you might notice a bit of sound but it's not like you'll be gaining big ponies.
If you want to notice it you really need to stick on a turbo or go play with the engine/GBox internals.
I would consider:
- turbo setup
- K24 swap
- N/A setup with B20 block (this you will notice)
- N/A setup with cams/valvetrain/valve job and some tasteful GBox modifications like a shorter final drive (maybe a 4.9) and an LSD