woodwardspecialties Posted December 19, 2004 Report Share Posted December 19, 2004 below is what tbyrnes site says about the asp underdirve pulleys. i am going to order.. but i dont know which to get... the crank pulley only... or the crank and alt. pulley. i have a custom tune with added rpm's at idel to compenste for the pulleys... but i just havent got them yet. please let me know what the difference is.. and which is better for my ss with e fans. thanks i want to order these as a christmas present for myself. "Underdrive pulleys reduce the amount of drag on the front of the crankshaft by changing pulley diameter allowing more power to be sent to the wheels. By reducing drag the engine will also run more efficiently. This mod will give you an 8-10 horsepower gain Part Number Item Price 549900 ASP Steel harmonic balancer pulley, required belts and harmonic balancer bolt $249.99 549984 ASP Steel balancer and alternator pulleys along with belts and harmonic balancer bolt (- 25% balancer and -23% alternator)$279.99" Quote Link to comment Share on other sites More sharing options...
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