Sorry this went unanswered for so long. I missed it somehow.dave383 said:has anyone put headers on your 500cid engine, i just got my 1976 coupe deville up and running again, and i was looking at putting headers when i get my dual exhaust system put on. any suggestions
Well the only air flow mod for the near future would be a drop in K&N filter. I was just thinking though that headers would help in air flow to the dual exhaust even more so since i will take out the cats. u should check out sanderson headers website and check out the header for the 500 cid.lux hauler said:Sorry this went unanswered for so long. I missed it somehow.
I'm sure headers will help the engine breath a little better but I'm not sure it would be worth it on an otherwise stock motor without other mods. If you plan to do any mods that will allow lots more air into the motor (intake manifold....porting, bigger valves), then yes, headers might be a good idea......if not, don't waste your money.
If the car that you plan to put the headers in, doesn't have a crossmember behind the motor mounts, these headers should be ok. If you do have a crossmember behind the motor mounts, and you want to use headers, you're going to have to find some with a rear facing dump.We're seeing more and more Cadillac engines in street rods, and are pleased to offer the first affordable aftermarket blockhugger for them. Sanderson's new CAD500 works in street rods and any later model chassis that doesn't have a crossmember located behind the motor mounts.
Hey Dave, its a 75 coupe deville.. And yes its two pipes front to back . The headers are the kit type the kind that you weld the primarys to the bolt flange and then weld on your collecter. The primarys are 2 1/2" with 3" collecters. No mufflers were installed for lack of space, just 3" pipe with 4" crome tips welded on at the ends. As far as suspension mods.. no, all I had to do was replace the metal gas lines with flex-type line just behind the rear end for the drivers side pipe to clear.dave383 said:Sounds good, what kind of 75 caddy do u have? did u do true dual exhaust from the headers? with 2 mufflers? and what type of headers did u use, and did u have to do any mods to the suspension to do the job. thanks a bunch dave 383