By the time you get to that stage where pipe lenght makes a difference your not building your own engines anymore.

For a street car, the idea is worth noting but you won't be in any kind of tuned RPM range for long enough to worry about it. That time spent is better off maximizing the combo you do have.


I think 1 3/4 is way big. I use that size on comp engines make twice the power. I'd stick with 1 5/8 max.

As with all engine decisions, it's a compromise. If you want some performance, design them by the science. If all you want is bling bling and getting the exhaust to the rear of the car as is the case in 99.99% of the street rods out there these days, stuff them in the easiest way.