1. Stabilize the rear axle frame with adjustable holes to situate rear axle in different levels of verticalness depends on various tracks. Especially when the range of compression occurred heavily during driving, these stabilizers perform well to better support the rear axle frame + Basic
2. We have taken the time to individually to carefully QC every part … this is another advantage of GPM having our own concept design fabrication and manufacturing facilities … almost all other companies outsource all of their production do very little QC never taking the time to unpackage, QC, then repackage their parts before shipping, we offer the best Quality Control and after product sold services to include constantly making our pro team racers and staff available for any question or advice