Rat Attack: 542hp Big-Block Chevy
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The D-shaped exhaust ports exit in the stock location for compatibility with standard exhaust manifolds and headers. Each head requires four longer-than-stock head bolts (arrows). Use ARP head-bolt set PN 135-3610 (or equivalent) and torque them to 65 lb-ft with Loctite PST on the threads. View Related Article
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