This is a discussion on Tune required for downpipe? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; Originally Posted by UEDan It will come on and you will over boost without a tune. Leave it off. +1 ...
thanks I guess i'll just put both of them on at the same time.
^^^^^ Wise decision.
2006 Subaru WRX-Thread: http://www.clubwrx.net/forums/engine-modifications/165158-ninfourteeners-progress-thread-pics.html
1978 Subaru BRAT-Thread: http://www.clubwrx.net/forums/engine...ss-thread.html
2007 Subaru B9Tribeca Ltd (PSM)........1994 Subaru SVX LSi(SOLD)
WRX 12 sec drag (vs. late model Camaro SS):http://www.youtube.com/watch?v=lw0vWdD2cjU
WRX track racing (catching a stg.2 WRX): http://www.youtube.com/watch?v=mELeSD1Mi08