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Originally Posted by 76bonanza
Dynomax cermaic coated
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Yep I bought a set of those from Jegs and had clearence problems on a 79 K5. THe header was actually hitting the weld on Zerk for the Slip shaft on the front drive shaft. Dynomax and Jegs both swear up and down that they fit the 4x4. They don't only long tube header I have seen fit a 4x4 was Hookers. If it hits just sitting there then your going to have BIG problems once that front axle starts moving around. That front axle will move side to side some.
Going to have to go with block huggers or find a set of shorties like the JBA's ($$$$) that have the flang up like the factory manifolds.