5.9MAGNUM EXH MANIFOLDS

I can’t see the full article. It seems like a good one. Just like everyone on here has mentioned long tube headers for early A cars are stupid money. I found the idea of running the magnum exhaust interesting and coincides with what a gentleman locally mentioned to me off handedly. I was going to buy the Doug’s Headers but if it’s a small difference in power it’s worth looking into.

On a 300hp crate 5.9l magnum, they did 318,360,340 manifolds and made 311hp, 314hp and 315hp respectively they didn't have magnum but there around 340 output.
headers they had shorty, 1 5/8, 1 3/4, tti and made 321hp, 319hp, 319hp and 327hp respectively. other than the tti there's barely any difference than the 318 manifolds and the 16 hp tti gain is debatable for the price.