GM Genuine LT5 Supercharger Belt Tensioner
Stronger Belt Control Starts at the Tensioner. # 12683675
The Genuine GM LT5 Supercharger Belt Tensioner was developed for the 755-horsepower C7 Corvette ZR1 and offers approximately 30% more belt tension than the factory LT4 unit. It also features a substantially larger tensioner shaft and bearing assembly for improved strength, stability, and belt control at high supercharger speeds.
Although this is a direct replacement for the LT5 supercharger, the LT5 tensioner has quickly become a “go-to” trick to maintaining the supercharger belt tension needed, for modified LT4’s. As supercharger speed and engine power increase, maintaining consistent belt tension becomes increasingly important. The factory LT4 tensioner was engineered for the original 8-rib drive system and factory power level, not smaller upper pulleys, larger lower pulleys, and the additional belt load created by a modified supercharger combination.
Better belt control helps reduce belt flutter, maintain pulley engagement, and minimize the boost loss caused by belt slip, especially during high-RPM operation and aggressive acceleration.
Key Benefits
Genuine GM OEM component
Improved belt control at high RPM
Larger, more robust shaft and bearing assembly
Approximately 30% more belt tension than the factory LT4 tensioner
Direct replacement for applications originally equipped with this tensioner
Used in our LT5 Tensioner Conversion and 10-Rib Belt Drive packages
Griffin Motorsports Insight
GM upgraded both the tensioner and belt-drive capacity when developing the LT5. That matters because a mildly modified LT4 can place equal, or greater the load on the supercharger drive system than the factory LT5. More boost does not help if belt slip prevents the supercharger from maintaining its commanded speed.
Important LT4 Fitment Note
This tensioner does not bolt directly onto the factory Camaro ZL1 or Cadillac CTS-V LT4 tensioner bracket. Installation on those applications requires the appropriate billet LT5 adapter bracket. If you need the complete conversion, choose our LT5 Belt Tensioner + Billet Adapter Bracket Kit, select the optional parts below.
What’s Included
GM Genuine LT5 Supercharger Belt Tensioner
Stronger Belt Control Starts at the Tensioner. # 12683675
The Genuine GM LT5 Supercharger Belt Tensioner was developed for the 755-horsepower C7 Corvette ZR1 and offers approximately 30% more belt tension than the factory LT4 unit. It also features a substantially larger tensioner shaft and bearing assembly for improved strength, stability, and belt control at high supercharger speeds.
Although this is a direct replacement for the LT5 supercharger, the LT5 tensioner has quickly become a “go-to” trick to maintaining the supercharger belt tension needed, for modified LT4’s. As supercharger speed and engine power increase, maintaining consistent belt tension becomes increasingly important. The factory LT4 tensioner was engineered for the original 8-rib drive system and factory power level, not smaller upper pulleys, larger lower pulleys, and the additional belt load created by a modified supercharger combination.
Better belt control helps reduce belt flutter, maintain pulley engagement, and minimize the boost loss caused by belt slip, especially during high-RPM operation and aggressive acceleration.
Key Benefits
Genuine GM OEM component
Improved belt control at high RPM
Larger, more robust shaft and bearing assembly
Approximately 30% more belt tension than the factory LT4 tensioner
Direct replacement for applications originally equipped with this tensioner
Used in our LT5 Tensioner Conversion and 10-Rib Belt Drive packages
Griffin Motorsports Insight
GM upgraded both the tensioner and belt-drive capacity when developing the LT5. That matters because a mildly modified LT4 can place equal, or greater the load on the supercharger drive system than the factory LT5. More boost does not help if belt slip prevents the supercharger from maintaining its commanded speed.
Important LT4 Fitment Note
This tensioner does not bolt directly onto the factory Camaro ZL1 or Cadillac CTS-V LT4 tensioner bracket. Installation on those applications requires the appropriate billet LT5 adapter bracket. If you need the complete conversion, choose our LT5 Belt Tensioner + Billet Adapter Bracket Kit, select the optional parts below.
What’s Included
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