[swarb]

Last paragraph.

Originally Posted by cslntuee

**snipped**
However, this is not the case for all engines, many of them do require the use of the harmonic balancer to prevent failure. Skylines with the RB20, 25 and 26 are a good example of this, which is why we don't make a pulley kit for them. The pulley kits we do make are for engines that do not rely on the balancer to any significant degree."

[URL]http://www.ft86speedfactory.com/go-fast-bits-pulley-kit-602.html

here is a manufacturer of dampers opinion- ATI racing
Crankshaft Vibration Dampers 101
The Danger of Power Pulleys & Understanding the Harmonic Damper

they make a 10% underdrive damper here
http://www.atiracing.com/products/da...dam-subaru.htm