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The best bolts I have used are the Porsche manifold to cyl head bolts. With a little Anti-seize on the threads they last indefinitely. Best quality bronze or SS nut & washer & you are set. I ordered ARP SS bolts but they are only available in slightly too short or slightly too long. Also ordered Suncoast install kit from the website thinking I would get OE fasteners, but it is average quality, overpriced aftermarket hardware. Due to the Hi-temps & constant heating & cooling you don't want grade 8 or above fasteners since they are too brittle. Most SS fasteners you find are not strong enough. You really want hardware designed for exhaust duty.
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