Fast Intentions exhaust is here! (continued)

XwChriswX

Since you've asked 2 separate questions, here are the answers to both...

1. (**It is my understanding that...) When you add breathing mods, this allows more air than stock volumes to flow through the motor, thus leaning out the Air/Fuel Ratio (AFR). When the ECU picks up on this, it tries to dump more fuel into the chambers to re-balance the ratio. So in this sense, yes an aftermarket mod can cause your mpg to drop. However, once you have all of the mods you want to do, and get a tune done, the tuner will adjust your AFR maps to accommodate the increased flow and bring your AFR's back to the correct ratio.

2. I do not have the 2nd generation cans, I have the First generation F.I. exhaust (with LOWER cans) and I have never scraped the exhaust. And the second generation cans sit higher than mine, so you have even more clearance. As long as you (the driver) take care to go slowly over speed bumps, and take hills/valleys at angles, you should not (knock on wood) ever have a problem. BTW - I am also lowered 1" all around.

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Bonnie - Stage 2, Audio build coming this fall!
R.I.P. Abby 3/29/10 - 3/30/14