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      12-26-2008, 06:13 PM   #3
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Drives: E92M3
Join Date: Aug 2008
Location: Long Island

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Originally Posted by ysv View Post
I will install the whole exhaust system (Supersprint) with two cats (instead of factory four) with stock ecu managment system? Will everything be ok (no checks, steady work)? or i will have to reflash it with some aftermarket ecu upgrade?
You'll be fine

Secound question - same situation, but the exhaust system now without cats at all (Supersprint can provide with catless system)?
you'll get a CEL...need to flash the ECU for catless or install O2simulators

Example: On some subaru's(EDM) it is needed to reflash stock ecu to get rid of check engine fault sign, slightly change boost presure setings (decrease boost) for the engine to work properly, on some(JDM) it is not.
unfortunately, Trey Cobb doesn't have an Accessport for us, so mail-in-tune or a tuner near you will need to be done for the more enterprising mods.

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