Do not buy cheapo headers. You'll regret it. Junk junk junk. I did that before I got the Doug Thorleys on my 66 440 Coronet. I will never buy cheap headers again. Thick flanges, heavy gauge pipe, fit perfect. I've installed some Headman elite headers and they have been very nice. I would check out those too. I have no experience with TTI's. They are very expensive. Tere are other companies out there that are not $600. I'd skimp on the exhaust pipes. My car ran a best so far of 13.02 on street tires with 3.23 gears. Thats with the same 2.25 inch exhaust that was on the 318 that was in it. I do want to go to a nice 2.5 system, but the money went to the headers. BUY GOOD HEADERS!