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Does anybody know of a set of headers for a 65 GTO that doesn't interfere with the Z bar ? I have a set of hookers on there now but they are not fitting good.
 

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I have three pipe and they fit. They are tight but they fit

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if you have interference, something is wrong. even cheap headers would not be manufactured allowing interference with clutch components. doug's are best for pontiac.
 

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I've had to modify every set of tubing headers I installed on 1965 thru 1967 GTO's for Z bar clearance. Also brake line mods. This includes Hedman, Hooker, Blackjack, and Mr. Gasket headers, both 3 and 4 tube. On one '66, I welded a tag on the top end of the Z bar, which allowed it to rest in a different, more forward position. This allowed lower Z bar arm clearance, and I retained my clutch pedal throw and geometry. Worked great. Please note this was years ago, and the newer stuff may indeed fit better.
 

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I just bought Dougs for my 70. Mad dog wasn't the greatest for customer service, and 6 week wait to get built. Headers on a Pontiac are a PITA.. They hit everything. I have headman tri y's on my 70 now, they hit the firewall, but I didn't have to modify the headers at all. They are coming off real soon so I can install the 455.
 

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I have not, but would opt for a set of RAM AIR manifolds for about $350. I would have to guess they will flow about the same as shorty headers, and be a lot lower maintenance.
 
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