VMP Performance is proud to release two new heavy duty belt tensioners for late model Ford Mustangs. VMP Heavy Duty Tensioner for the 2007-14 Shelby 5.4l/5.8l and Heavy Duty Tensioner for 2011-15 Mustang GTs with TVS supercharger are the perfect solution for slipping and broken belts.

Official Release:

The VMP Heavy Duty Tensioner is the solution for slipping and broken belts. When your stock tensioner cannot act quickly enough, the factory belt can slip, jump, and snap. As GT500s get older, factory tensioners loose consistency in their stiffness and their ability to control the belt.

VMP developed the heavy duty tensioner as the solution for slipping, jumping, and ultimately broken belts at higher boost levels (15psi+). If you have noticed excessive dust, chunking, or lost ribs, you are experiencing the symptoms of an inadequate tensioner. The more boost you run, the more stress there is on the belt, leading the belt to stretch. During shifts and burnouts the tensioner has to work double-duty; keeping both tractive effort on the supercharger pulley and dealing with the resultant oscillations and yo-yo effect of the belt. When the tensioner is not strong enough to do its job the belt goes slack momentarily; landing back on the pulley, it tends to chunk and eventually tear ribs off. The VMP HD Tensioner solves this problem—With its higher spring rate, it can handle the most demanding belt loads.

Features:

• Reduces belt slip
• Increases belt life
• 20% more tension
• Precision machined from billet aluminum
• Does not crack and fail like the stock tensioner in high boost applications
• Compatible with stock 6-rib and VMP 8-rib conversion
• Recommended for 6-rib with 69mm pulley and 8-rib with 69mm upper & 15% lower