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There is a boat load of headers that fit, which ones are the best and longest lasting?
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JBA stainless ceramic coated shorties. Fit great, you can get to most port bolts with a socket, and they have ball/socket collectors, so no collector gaskets are used.
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What year is your car? 1970? Virtually any of the major mfgs' headers will work. JBA's are one of the best.
I have Heddman shorties on my '66 w/70 351w. Much better than long tubes Long tubes give much less room around sensitive things like starters, steering, etc. Heat is a problem too. You might have problems with the long tubes hanging too low and scraping the ground on humps. particularly if it is lowered. Spark plug accessability is an issue too. The guys here can help you out there. And with shorties there is very little hp loss until you rev the engine real high.
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I have the same as MS - the JBA coated shorty headers on my 351W. Great fit and much easier to install than the old Heddman long tube ones I had before.
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Part numbers and vehicle info would be great. Auto,5 spd, air,ps, pb stock steering or rack and pinion? are they for a certain year vehicle only or 65-73? Just a few questions that may apply.
Sorry guys but there are so many variables that this could be a what do you have and what fits topic.
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Been looking into the JBA's. My car is a 1970 convertable I currently have Hedman long tubes that I've been running for about 37 years. I took them off the 302 with a 3 speed and put them on the 351 with a C4 but they don't fit as good and they are beginning to rust out. JBA shorties seem to be the best recommendation. That is also what the exhaust pipe guy recommended. I was hoping to patch it but he say's the current job is too junky. I just didn't want to spend the money. So if I'm going to do it all what is best X pipe or H pipe? I might not have a choice. I'm not sure a X pipe will fit,
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An X pipe has smoother flow, and in theory helps with power, but my guess is that on a typical street engine there's little if any observable difference.
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It will "kill-off" some of the rumpity-rump tone of your "high-dollar" camshaft too..................if that's important.
6s6
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That's true too. If you want rumpity just forgo the crossover. My car doesn't have one and it sounds like its got a bit of a cam to it even though its just a stock A code 289.
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My main reason for X or H pipe is to stabilize the exhaust system. It keeps the system from rocking back and forth, pivoting on the gaskets between the header and the head. The gaskets will last alot longer if the two exhaust pipes are welded together, whether with a flow tube or even a piece of angle iron.
If it also improves sound or increases power, so much the better.
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I have an H pipe on it now and it is holding the system stable. I've read that an X pipe makes more power but with my set up I think that is negligible except that I like the idea of removing the "rumpity". IMO the "rum pity" is a Chevy thing. I just don't know if the X pipe will work in a convertable because the chassis stiffener plate might be in the way.
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