Katech LS Car Application Billet Belt Tensioner | For LS powered Corvette / CTS-V / Camaro / Firebird / GTO / G8 & SS (KAT-A4425)

Katech Performance

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Billet Belt Tensioner by Katech Performance

The Katech LS Billet Belt Tensioner is a precision-engineered upgrade designed to eliminate belt slip and accessory drive failures under the most demanding conditions. Crafted from 6061-T6 billet aluminum and optimized through Finite Element Analysis (FEA), this tensioner delivers superior rigidity and consistent belt tension where factory units fall short.

Developed from Katech’s legendary C5-R Corvette racing program, this component carries decades of motorsport innovation into your LS-powered street or track build. Every detail reflects race-proven engineering, from its CNC-machined body to its corrosion-resistant anodized finish.

Factory tensioners often flex under high RPM, causing belts to walk off-center or even throw the belt entirely. Katech solved this problem for endurance racing—and now that same technology is available for your performance build. An OEM pulley is used with raised belt keepers to reduce the belt’s ability to walk away from the centerline, ensuring perfect alignment and maximum reliability

Not recommend for use on supercharged engines unless the supercharger has a dedicated drive.

Features

6061-T6 Billet Aluminum Construction | CNC-machined for strength and precision.
FEA-Optimized Design | Engineered for maximum strength-to-weight ratio.
High-Load Spring Mechanism | Maintains consistent tension under extreme RPM and load.
OEM Pulley with Raised Belt Keepers | Prevents belt walk by keeping the belt centered on the pulley, reducing the risk of misalignment or belt loss.
Quick Installation | Includes hardware; installs in under 15 minutes.
Race Approved | The original aftermarket tensioner approved for LS racing series engines.
Engineered, machined, and hand assembled at Katech Engineering

Technical Specs

Material: USA 6061-T6 Billet Aluminum
Finish: Anodized Tensioner with laser-etched Katech Logo
Weight: Approx. 1.2 lbs
Operating Range: Designed for sustained use at 7,000+ RPM
Belt Requirements: 2010–2012 Camaro: Gates K060827 / 2013–2015 Camaro: Gates K060790
Compatibility: LS1, LS2, LS3, LS6, LS7 engines in Corvette, Camaro, CTS-V, GTO, G8, and SS