pulley system
They reduce rotating mass by about 1 pound, which will improve performance some amount. However, the increase in performance would be way too small to feel, considering a lightweight flywheel can reduce rotating mass by about 8 pounds, and they aren't all that noticeable.
I have a set on my S, and I don't think they amount to much as far as power, I didn't feel anything, but the engine response is slightly better. Overall I'm happy with them, I also plan to put in a Toda flywheel (8 lbs)......
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Flywheels are less, until you consider the $800 labor charge...Pulleys can be done in a driveway in 20 min.
One of my pulleys committed suicide, but the new ones are of a different design and should be bulletproof.
One of my pulleys committed suicide, but the new ones are of a different design and should be bulletproof.





