[RocktimusPryme]

Dyno testing on exhaust options are ubiquitous. You can find plenty of muffler testing, and Ive seen engine masters prove that you actually want a little length of pipe after the header collector to make max power.

But Ive heard it proposed that while, necking down the exhaust near the header (or restrictive bends) will kill a lot of power. That effect is reduced as you get further back from the engine and the exhaust has diffused.

I know some of you have done plenty of dyno work. So Im curious if anyone has real life experience on that? Does power care less about your exhaust choices at the rear of the car than the front?

Im putting together my drag n drive project. It has 3.5 inch pipe into 3.5 inch straight through dyno flows, but if I wanted to make over the axle tailpipes I think 3.5 inch tubing might be a tough ask. So I wanted to know how much power I would be killing if I neck down to 3" after the mufflers.

I am going to put V band clamps on the header collectors for quick removal, so maybe I could have a stinger race pipe you could quick swap on, but I dont think the full 3.5" exhaust with mufflers would cost much, if any HP. So I would rather save myself the work.