Originally Posted by christian370z

I would recommend at least getting a dyno run performed where they monitor the A/F ratio to see what the car is running. Sometimes, G3 intakes lean the car out beyond the safe limit where I could tell you that it isn't a problem: my car was detonating slightly before my tune after installing the G3 intake even after resetting the ECU. However, conversely many run the G3 without a tune and have had no issues.

Originally Posted by Huck

I'm not an expert so I could be wrong, but with that many breathing mods I think you should definitely get a tune to adjust your AFR's. It my understanding that if you have more than two breather mods, like an intake/exhaust combo, then you should tune it. You're really opening up your car's lungs, so I would get the tune to maximize power and make sure that your AFR's are within a safe range. I have Stillen Gen3's, FI CBE, Stillen pulley, and the FI LTH's are coming today, so I will be getting a tune after that.


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