about 2% of the gains from the typical UD pulleys are derived from underdriving the accessories the rest come the dramtic decrease in rotational mass...like a light weight fly wheel or light weight wheels...
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'01 acura CL-S 260/232 (stock)
2500$ 3.5L short block
299$ cai 10 whp
299$ lowered 1.0/1.25
999$ headers 30 whp
look on there face...pricless
PB 1/4 13.794@101.54
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