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139 0402 Valve 3 Z

One of the keys to Endura-Tech's improved durability is the heat-treating and shot-peening processes that take place to increase the spring's strength after it is manufactured. This creates a visible difference on the exterior of the valvesprings (right). The Endura-Tech springs are smoother and have a unique, shiny gray finish.
Endura-Tech Valvesprings - The Case Of The Bionic Valvespring

One of the keys to Endura-Tech's improved durability is the heat-treating and shot-peening processes that take place to increase the spring's strength after it is manufactured. This creates a visible difference on the exterior of the valvesprings (right). The Endura-Tech springs are smoother and have a unique, shiny gray finish.  View Related Article

 

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