What is the exact performance difference with Tri Y vs. Long tube headers?
(69 Camaro, 350 @ 400hp, built for torque 1500-5000 RPM, 4 sp., 3.31 gears)
Looking to go with 1 5/8 tubes.

Thanks,
John

Can't really say b/c all combinations vary w/ regards to your question.

Generally, Tri-Y's build more midrange t vs 4-tubes, generally.....

pdq67