Machined in house at TKM Performance Tested and Proven to Provide long lasting Performance under Extreme Conditions including Ethanol and Methanol Fuels Same Guides that are used on RTR Drift Team, Cleetus's Neighbor, and McFlurry (We all know how tough these guys are on stuff) and many others Custom blend of Wear Resistant Acetal Polymer CNC Machined No Wear Liners Needed Were only available for in house builds, now we are offering them to everyone! Fits GEN 1/2/3 &  GT350/Predator