Have spoken with company requesting not underdrive but stock spec lighter pulleys. I was told that for each 1 lb we could get off the crank pulley it would be an increase of 2.7 HP. They told me they could replace the crank and alternator pulley on the S2000.
They told me between the 2 they could drop over 1 lb, but they need a miniumum order of 30 pieces. Order has to be from one source. It is possibly we can generate some interest.
Call them at 631-586-9525 .
Thanks.

 

Ball park cost on them?

 

Did not nail it down to well but it was > 150 .00 but that may not tell you anything. You may want to call them.