FORGED PISTONS TC96 TO 103CI 9.5:1 .020 Category_Default Category/SLED/Polaris/Matryx BOOST know that the Primary Engineer

know that the Primary Engineer is designed for the long haul

Better throttle response

You never know what the weather's going to be like

If you’re looking for the best Mav R glass windshield

FORGED PISTONS TC96 TO 103CI 9.5:1 .020 Category_Default Category/SLED/Polaris/Matryx BOOST know that the Primary EngineerKB forged pistons are made from 4032 forged alloy with an 11% silicon content, formed in a forging press and then fully machined. Due to the material and manufacturing process these pistons have superior crack resistance under detonation or pre ignition. They are suited for Street or Race applications with power adders such as NOS or boost. All Twin Cam and Sportster application feature coated skirts.