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426 cyl head to header joint
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[QUOTE="SFO, post: 551908, member: 21864"] This is an interesting observation. I have been taught that the most critical part of an ex. pipes design is at the high velocity area of the first 12". I have seen more than one tuner try to grind the anti-reversion hump out of the yz-f ex port. WB sells a torque stuffer that plugs the ex port by restricting the dia. at this junction. Modifying the flow of the exhaust gas at this union will certainly change things. If you get what you are looking for is only a function of what you want [/QUOTE]
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426 cyl head to header joint
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