The Powertrax No-Slip Traction System lets you unleash your Performance Vehicle or Muscle Car's maximum power by getting it all to the pavement. Easily converts your open or limited-slip differential for superior traction output. The No-Slip Traction System is the most important break through in traction adding differential technology for high performance applications. With the performance of a spool off the line and full differentiation when turning, the No-Slip Traction System is the perfect combination for the street or strip. The Powertrax No-Slip Traction System combines the extreme traction performance of a locking differential with the smooth and quiet operation of a limited slip differential. When powering straight ahead, the drive wheels are locked together so maximum power is delivered to both wheels. But when turning, the outside wheel disengages and coasts ahead of the inside wheel. Power is delivered to the inside wheel. Easy to Install - Do it yourself with no special tools. Strong and Durable - No wearing surfaces or clutch packs to burn out. Precision Synchronization - CNC machined for smooth & quiet operation. MADE FOR YOUR HIGH PERFORMANCE CAR OR TRUCK !