5.35″ Top Insert For XR-1 Race Blower 

5.35” TOP INSERT FOR XR-1 RACE SUPERCHARGER (#2108) TBS XR Race Inserts are machined from 6061 billet aluminum in several sizes to accommodate specifically to your application giving you the ability to tune boost to track conditions and engine configuration. These Race Inserts provide more velocity to the fuel/air charge and allow you to match the fuel curve to boost curve, allowing the two to become linear to each other. You can tune when the boost is delivered, whether that’s immediately off the line or gradually as the engine speed increases. Below is a youtube video describing the usages and available sizes.

• Weight: 5 lbs
• Dimensions: 16×9×3 in
• 71 / Low Profile: 71 Series
• XR / Race: XR