This is an HD Tensioner upgrade kit (hardware robustness and increased spring tension) that is similar to the Magnuson 31-12-00-082. The difference is that we have added an alignment sleeve to the adapter spacer, greatly improving the hardware stability.

This upgrade is applicable (as a minimum) to the following list of Magnuson Supercharger applications:

2004-06 Pontiac GTO
2003-07 Silverado and GMC Sierra
2003-06 SSR
2006-09 Trailblazer SS

Other “Hot Rod” kit applications may be able to use this as well. Please contact us with inquiry.