Message: Looking for anyone has installed a set of the headers available from edelbrock on a GEN I 3.9. What kind of performance/mileages increases have you recognized. I have recently redone the complete exhaust, went from 2" to 2.5" with a high flow cat and a bullet muffler and have noticed a slight increase in mileage and a decent increase in mid range. Are the headers gonna give me anymore or is it a waste.
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Subject: GEN I HEADERS