Tomei Technical Trax Advance 2-way LSD for the Scion FR-S and Subaru BRZ has been evaluated for its highest performance in the race industry. Tomei Technical Trax offers highest durability, strength, and usability with years of experience in developing limited slip differential. This LSD is packed with 20 advance clutch disks that improves transfer of power to the rear wheels. This LSD is dubbed to be the "super extreme" LSD for serious drivers. This differential is great for the track and drifting.