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No Springs Attached!

Utilizing an exclusive polymer torsion system, instead of a spring, PolyForce™ Belt Tensioners by Kit Masters are built to last.

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Torsion to the Rescue!

Conventional belt tensioners use springs to hold their position and tension. However, springs can only flex so many times before they fail. PolyForce™ Belt Tensioners replace this spring with a longer lasting, new and unique polymer Torsion system.

A compressed silicone replaces the spring, thereby eliminating the primary cause of failure.


Improved Bearings

The other common failure point in a belt tensioner is the bearing. The pulley bearing absorbs a huge amount of vibration and can often fail too soon. PolyForce™ Belt Tensioners have dramatically improved pulley bearings to give them extended life.

Our bearing is designed specifically for pulley applications and features:
– Outer Ring Rotation
– Anti-Vibration Grease (won’t separate)


Search Belt Tensioners by Application

Find the appropriate replacement for your belt tensioner by using a vehicle’s year, make, model and engine.

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Modularity = Greater Coverage

The PolyForce™ Belt Tensioner modular system allows you to stock a few components while maintaining maximum market coverage.

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Mobile Tensioner Repair

The PolyForce™ Belt Tensioner mobile kit contains everything you need to identify & assemble a brand new belt tensioner in minutes!

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Download the Catalog

Download the PolyForce digital catalog in PDF format to use on the go.

2 Year / 200,000 Mile Warranty

All PolyForce™ Belt Tensioners are backed by Kit Masters’ rock-solid 2 year / 200,000 mile warranty. That’s TWICE as long as the competitor’s warranty!