I use a wire brush to get the old gasket shit off. put a rag in the exhaust ports so you dont get shit inside the heads,when cleaning! as for the bolts i go to the hardware store and get some grade 8 bolts. remember after you made your install warm the headers up shut the engine off and retighten the bolts. i would do this at the lake. dont run it long out of the water!! hope this helps.:wink: :wink: :wink: