« Reply #8 on: July 06, 2012, 09:10:29 AM »
No need to pull the butterflies - simply remove the ECU, send it to Guhl motors along with a check for $375 plus whatever shipping is, they will reprogram it to open the 'flies earlier and remap if you have aftermarket exhaust,"
If you mean a whole exhaust system that is one thing. But just replacing the muffler? I doubt that will matter in the reprogramming.
>" and you will pick up 20+ ftlbs of torque from ~3k to 6K where the flies open from the normal tune. "
20?
??!! You are talking some really big numbers, there...
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