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      03-27-2013, 10:27 AM   #10
ajsalida
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Drives: 95 M3, 02 R1150GSA, 09 335xi
Join Date: Aug 2010
Location: SW USA

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The price range on DP's is really amazing. At the low end $149 OBX, the high end $1500 Akrapovic. Funny there are no dyno comparisons...none

I bought a set of Xi OBX's just too look at them. Needed a lot of dremeling inside and flow/welds did not look so good. 2.5" all the way. Ended up buying some VRSF's for like $360 shipped (can't remember exactly). Looked like same basic material (304?) as the OBX's but had a bigger/wider bell area tapering into 2.5" about 1/3 way down, much better flow (eyeballing them) and fit pretty well. Also came with good gaskets and higher quality hardware. OBX's I never did install even after 2 hrs dremel work. Mainly I read a lot of people having fitment issues with them and I did not want to find that out mid installation.

YMMV but I can't see ANY engineering, durability, or performance case for DP's costing more than $400 or so. Unless it is the soothing peace of mind you get knowing you've paid a great deal of money for some pipe.
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