E46Fanatics - View Single Post - EU2 tuning with stock set up?
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Old 06-05-2012, 10:07 PM   #11
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Join Date: May 2010
Location: Wake Forest, NC
Posts: 1,886
My Ride: 2004 330ci ZHP 6MT
Originally Posted by JDUTHIE View Post
doesnt the SAP help not burn up the cats by leaning out the exhaust on startup? So on a stock setup, this may/may not be a good thing?
Most people delete the sap because they have deleted the cats as well. No need for it anymore. I BELIEVE the SAP actually helps warm the cats up to lower emissions on cold starts BECAUSE the engine is running lean. Could be wrong.

1995 325i 5mt ArcticGrey/Dove - SOLD
2004 330ci ZHP 6MT SilberGrau/Black - SOLD
2001 330i M-Sport 5MT StaulGrau/Grey - SOLD
1992 Accord LX Sedan 275k miles all original - DAILY
2002 Chevy Suburban LT Autoride - TOY HAULER
2005 GMC Sierra 2500HD SLT - RACE TRUCK!
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