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Easily Built to Last

The PolyForce™ Belt Tensioner in-store modular system allows you to quickly build heavy-duty belt tensioners instead of investing in an excessive amount of inventory.

Stop Missing Sales

Instead of keeping extensive inventory of heavy-duty belt tensioners, distributors can now stock a minimal amount of components.

With only 25 different, inexpensive components, you can assemble 100+ unique heavy-duty belt tensioners. This flexibility means less missed sales.


Simple Assembly

Kit Masters has made it easy, again. By simply assembling three components, you can build a complete, better-than-OEM quality belt tensioner. Watch our step-by-step instruction video to see just how easy it is.

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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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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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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!