In a previous review, Aaron Warner was seeking to remove some of the slop from his center belt with the use of this part. There are three options, one is to shim the Rear Bulkhead Bearing Housing, another to create a custom belt tensioner. I have found that using this part, along with the lower graphite deck removed all slop in my center belt completely. Furthermore, it is a beautifully machined part that certainly adds a bit of bling factor to the drift car. Not an essential upgrade, but it sure makes the car stand out!