Spring loaded tensioner

MST is proud to unveil one of the most significant upgrades of the year for our Serpentine Pulley System—the Patent-Pending Spring-Loaded Idler Assembly. After years of rigorous development and testing, we are thrilled to offer this direct replacement for your existing static mount setup.

Engineered with the same streamlined design that MST systems are known for, this new assembly not only enhances performance but also ensures effortless installation. Crafted from aircraft-quality aluminum and stainless steel, it delivers superior durability, precision, and reliability—all backed by MST’s commitment to quality and functionality.

Even if you are not currently running an MST system, we can accommodate most existing setups, making this a must-have upgrade for enthusiasts looking to improve belt tension and longevity.