Supersonic indeed!

Now for the questions?

What car is they on ( 69 Gtx or 68 runner ) and why SO BIG?

If an exhaust valve is approx. 1.81 diameter in a good wedge motor then 2.00 ‘OD’ pipe should be plenty?

Would this design work my 71 Gtx (512, 440-1) and how much for another set ( please ) lol...

Last edited by Gtxxjon; 03/31/21 09:07 AM.
Carpe diem, quam minimum credula postero, thanx Horace!

There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...