Quote:
Originally Posted by Vettezuki
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Tons of LS7 headed/engines have serious valve train issues. GM only used something like 120lb springs with a 2 Piece, hollow sodium filled exhaust valve, yet used a Ti Intake valve. Stock untouched engines were dropping valves pretty commonly and any cammed car would snap the valve. Since the spring rates were so low it would cause oiling issues, then the guides wear faster than normal and bam, dun gon fucked up ya motor. Made it pretty mandatory to change out at least the exhaust valves.