440 under car headers need advice.

73440abody said
Sorry if I offended you, but I've seen similar builds to mine on the dyno with and without Schumachers. There is a difference when you start making more power.

PS: I guess I'll have to upgrade my rear view mirror now knowing you don't put down that kinda power on the street. Lol

I can't understand why the forums all attract jerks and know it all types like the guy calling BS on you like that. That's the reason I rarely come on here anymore. Anyway here's what I know and none of this is new or groundbreaking. The Schumacher try-Ys fit good, work with PS and make life easy but cost somewhere between 30-50 hp. Unless something has changed, none of the under chassis headers like TTIs will clear the factory PS box without some kind of heavy hammering or rework, they are a pain in the *** to install and they trap the starter. Hooker and other fenderwell headers clear the PS by a mile and don't trap the starter but as we know require big holes in the inner fenders, have tire clearance issues and if you want a nice clean under car exhaust it will be an issue because the collectors are in the fenderwells. The Pro Part headers form Bob Mazzolini racing solve all the problems except you have to cut one small hole in the passenger side fenderwell for the cylinder #8 tube and a medium size hole in the DS fenderwell for the tubes from cylinders #3 and 5. Those tubes run through the fenderwells and curve right back to the collectors under the car. I just swapped out my Schumachers for the Pro Parts and I'm very happy with the results. I still have the factory PS, the only things I had to do to make that work was fab a custom 90 degree fitting that is very short and tight to the box and put one small dent in the tube from cyl 3 to clear it and I cut the return nipple off the PS pump and changed the clocking from about 2 O'clock to 4 O'clock so the return hose could be routed away from the tube from cyl 1. You also have to replace the factory steering shaft coupler with a Flamming River U-joint style coupler for clearance. The only issues I've encountered with the Pro Parts are the left front tire (I run Mickey Thompson street front runners) just kisses one of the tubes at full lock and the collectors hang down pretty low so ground clearance is compromised. I'm planning on reworking my collectors to remedy that. As far as custom headers, I very much doubt anyone will be able to solve all the issues and make headers that solve all the problems. Some compromise is a necessary evil with a big block A body.