>>28213481
>Except your numbers are embellished
lols, you can gain 5% of a heavily modified motor, even more on a stock motor, and even more from a boosted motor,. Both of these are showing dyno info for cheap off the shelf stuff with oversized tubing:

https://youtu.be/SzxHG3Ma4r8?t=188

https://www.mopardiy.com/gen-iii-hemi-headers-shootout-finding-the-perfect-header-for-your-hemi/

Properly tuned longtubes on any v8+ engine with ported heads and freeflowing intake are a 40hp/50ft-lb gain across the entire powerband.

This isn't even a debate and has been known since the 60s.

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Why do you need backpressure again?My dad still insists that larger pipe is higher power. Then he

Why do you need backpressure again?
My dad still insists that larger pipe is higher power. Then he