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      06-14-2009, 10:32 PM   #6
Slidewayz
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Drives: 2007 335i
Join Date: Jan 2009
Location: Oakland, CA

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Quote:
Originally Posted by Vudoo4u2 View Post
simple:

if you arent catless, run stage 2

if you ARE catless, run stage 3

even if you have exhaust and downpipes, but your exhaust has HFC's or your downpipes do...those count as a catalytic converter, so..stage 2
I don't know that it's so simple. Shiv's recommendations don't factor in an upgraded FMIC or quasi-catless ops.