Geoff Green
Enthusiast
I have a question regarding header and exhaust dimensions. The square inches on a 3" exhaust on each side is 7.065. If you increase your headers to 1.75" your total square inches on each side is 12.0203 squares inches. It seems that you are restricted by your 3" exhaust. If you have 1.625" headers your total inches is still 10.3645 trying o exit a 7.065 exhaust. With a 1.5" header you still have 8.83 square inches. I can see changing out the cats and back because you only have 4.9063 square inches on a stock 2.5" exhaust. Is there really any gain in changing headers on Gen 2? Geoff Green