I have a stock 02 WRX and need to get my up pipe replaced so I dont have to worry about that dang catalytic converter.
1. What are the best up pipes? I've heard of GrimmSpeed, Invidia, and COBB.
2. Do I need to do anything to my wastegate when I replace the up pipe?
3. Do I need to do a tune after I replace my up pipe?
4. Is it ok to just upgrade the up pipe and nothing else?
Thanks for any help and I'm always open for suggestions.