Z20le* A/C removal kit with Billet Tensioner for RnD Underdrive Pulley

Billet Tensioner Kit for Z20le* engines

This pulley kit is designed to replace the original pulley on your springy belt tensioner arm.

The original pulley is smooth sided, and designed to run on the back of the Auxilliary belt. If you try to run this pulley on the belts grooved side you will find that it just keeps pinging off for fun, hence we invented this little fella!

Using this pulley and your original springy tensioner arm will stop your alternator belt firing off all of the time at high rpm and during fast gear changes (standalone ecu's with flat shift are really prone to this!).

It can be used with the standard crank pulley or an under drive crank pulley, just needs the appropriate sized belt.

Note - This advert is for the billet tensioner pulley kit and a 5PK978 drive belt, which will work with our underdrive pulley or any others of the same dimensions.

We offer a few different packages to suit different setups, as listed below;

Under Drive Pulley Only, no belt

Under drive pulley with Billet Tensioner kit and belt - AKA the Air Con Delete kit - This kit requires you to retain the springy tensioner part of your original air con setup

Under drive pulley with belt for direct drive - Best used with an adjustable alternator bracket

Under drive pulley with belt for retaining A/C

For setups that are aiming beyond 450-500hp, we recommend to use a damped pulley (the standard pulley is not a bad option), as crank shaft harmonics can cause problems without the damping. For that setup we can provide the below kit;

Billet Tensioner kit with belt for Standard Crank Pulley

If you already have an underdrive pulley, then you could buy the tensioner pulley kit on it's own;

Billet Tensioner kit only

Billet Tensioner kit + belt to suit our under drive pulley (if you already have the pulley fitted)