I have decided to put a 3" exhaust system in my FD from the engine back with a high flow cat and an RB Dual Tip exhaust. I will also be installing an Apexi Power Intake Kit.

My question is; will I have to tune the car after installing these or will the computer work everything out?(I have the stock computer)

Also are there any potential problems that could arise from this upgrade? e.g. engine problems... or something that may cause serious damage?

Thanks.

 

You will need a boost controller to maintain boost at 10 psi. That's it.

 

I have a 3" DP w/ a high flow cat combo with the greddy PE exhaust, and the apexi intake. I've only seen it spike on a really cold night, might have hit like 11 or 12 psi. So yea, i'd go with a boost controller, i just installed a MBC, so its not a problem anymore.