M2 stage 3 ecu and 99spec twins?
maybe, the 99 twins supposedly flow more air than the < 99 stockers but the M2 ecu runs pretty rich in the higher rpms. the only way to know for sure is to slap a wideband O2 sensor on the car and find out.
Rotary Freak
Joined: Dec 2002
Posts: 2,522
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From: Slovenia, Europe
I would say yes. As long as you keep it under 13psi, you should be fine. But only wideband can 100% confirm this. Could be your injectors arent flowing as much as new and that could be fatal for example.
