Powerflex Performance Black Series E9* Rear Shoch Absorber Upper Mounting Bushes are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing. 

12mm Fits performance shock absorber which has 12mm thread, and for standard Shock Absorber (or Performance Shock Absorber) with a 10mm thread, select 10mm.

Powerflex Performance Black Series E9* Rear Subframe Front Mount Inserts are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing.

This item is to be used with the original bushes. 

Powerflex Performance Black Series E9* Rear Subframe Rear Mounting Inserts are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing. 

Powerflex Performance Black Series E9* Rear Toe Adjust Arm Inner & Outer Bush are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing. 

Powerflex Performance Black Series E9* Rear Upper Control Arm to Hub Bush are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing. 

Powerflex Performance Black Series E9* Rear Upper Lateral Arm to Hub Bush are for track/race use only.

We used the original Powerflex Bushes on our race cars, but upgraded to the Powerflex Black Series as soon as they were released, and we noticed a great improvement during testing.