1.75" compared to 1.875" headers, RESULTS!!!
#17
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AGAIN, bigger is not always better. Thanks for sharing the results. Big tubes tend to sway towards BIG cubes and FI. On a stock ci set up with bolt ons, the big primary set up is not always best.
#18
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I'll post Dyno graphs of y truck. I went from stock manifolds to the ARH 1 7/8 hense the test above was done. My truck responded the same way and I have a TVS1900 on it. It hardly changed the AFR. I'll get my graphs up to show the difference. The stock manifolds flow quite well