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  • Users: skylane
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  1. skylane

    440 Source Stealth Aluminum Heads

    My 440 was running great with 452 Heads ported and polished with stainless steel valves, but I put 440 Source Heads on and WOW!! I was turning 13.5 to 13.7 @100 before and can't wait to see how much difference I get in both time and speed. I was getting valve float past 4600, but the springs...
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