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      08-12-2013, 04:39 PM   #21
KmndntKlink
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Drives: 2010 e92 m3
Join Date: Aug 2012
Location: Toronto

Posts: 421
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What's the difference between test pipes & xpipes in terms of cats, power, smell & sound?
Are test pipes headers back (ie deletes all the cats?) From what I understand HFC gets you most of the power with no smell, which I think is great for daily drivers

I'd like to get the extra power but I don't want it to smell or drone or be race loud, so I was thinking a challenge xpipe and a dinan or OEM mod rear. It also has to be bolt-on & easy to go back to stock.
I hear test pipes require cutting stuff & so does the challenge street xpipe.

any experts care to chime in? TIYA
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E92 ///M3 in Dakar Yellow, M-DCT, iDrive, 220M OEM rims, Active Autowerke Green filter, Turner Motorsport test pipes, BPM stage 2 tune, Stoptech ST-40 F+R in yellow.
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