i just bought my 05 wrx and love it just had a few questions about parts i couldnt find and answer to in a search any help would be greatly appreciated.
i was just wondering what would be the better first mod?
which would give better hp numbers?
and is it safe to run uppipe and downpipe without some kind of fuel managment?
and the last question does this part really work to clear cel's with the downpipe uppipe combo?here is the link http://www.fastwrx.com/celfixkit.html
thanks again for our time and patience