another exhaust question please help
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From: hawaii
Car Info: My 2009 FIT for sale!!!!!!!!!!
good decision on the dp. would be better if you get a catback along with up pipe. its probably the biggest and effective upgrade i did when i first got my wrx. but only thing when i installed the dp and up..... it backfired when i went on a test drive 
Originally Posted by FromMugen2STI
Ok...i want to buy a helix dp but i have a stock 05 WRX catback...
will the helix dp fit on my stock midpipe?
will the helix dp fit on my stock midpipe?
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From: In my TD04 WRX
Car Info: 2002 WRB WRX
Originally Posted by ej20boost
but only thing when i installed the dp and up..... it backfired when i went on a test drive
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