you guys are talking about two different things. the OBD system has to report emissions OK and the shiffer test has to pass. alcohol will make your exhaust gasses cleaner, you can use o2 sims and other electronics to pass the OBD test. Im in talks to start selling o2 + secondary airpump simluators, i'll let you guys know if i can beat the current prices.
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2002 TiAg M3 6mt
deoranged, dechromed, led tails, ZHP knob, UUC SS v3, GROM, OEM 220M 19's, Michelin Supersports
2006 YZF-R6, black, ohlins, pazzo, BMC, cat delete, vance hines csone, YEC racing tune,-1 +2