I bought a cheap set off ebay for like $160USD. They arent terrible quality wise but, I think you could make a better setup with a set of stock truck manifolds and a buzz box mig welder... Those will require relocation of coils, custom plug wires, compromises on exhaust routing or a front fender dump, rad and cooling compromises.... Just to name a few.
FYI I never ended up using mine, a cast china log would be better for a street car, my opinion.
Truck manifolds FTW. Depending on your plan of course. Twin T4 or T3/T4 hybrids are an easy make/fabricate. You can make them to use stock truck, Vette or F-body accessories, stock radiator location with lots of room for intercooler, fans, etc. The down pipes are the biggest issue if you want rear exhaust. I'm a big single T6 guy presently only because of 'streetableness'. No inner fenders and fender exhausts make duals easier. And pricewise, a T6 is more economical than most duals upto 1000 or so HP imo.
I believe the record on truck manifolds is around 1800hp, so they don't hold anything back.
p.s. - you can mig truck manifolds - works fabulously just not very pretty.
Great if you're making big power, but they are truly a waste if you're on a budget. Truck manifolds are good to well over 1000wh, I believe the record is close to 1500. I'd say save your money for your fuel system or electronics - somewhere that the money spent will make a difference unless you're in the 1300+hp range.
My reason is nothing to do with power. It is reliability and maintenance. I will kill my saving account for no header leaks. This is not advice everyone should follow. Great to see you guys find ways to save money in the hobby.
Reliability is defined by using stock manifolds with welded flanges. I've used 2 different sets of chinesium stainless headers and they leaked like it was their job. Chronic welding, planing, off/on every month or two, They definitely would not make it 1500 miles. My son's 327 and 421 both leaked with that junk. We put on a set of truck headers with welded v-bands and they are yet to leak once. I'm running a set as of truck manifold that i welded the v-bands on myself with the wrong wire and they are yet to leak.
Both of the setups described above make over 800whp. You choose - truck manifolds FTW imo.
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