The ATS Thermal Bypass Valve Upgrade with Billet Filter Coupler is a must-have for any truck with a 68-RFE or Aisin AS69RC transmission. It replaces the faulty bypass valve design, ensuring 100% of the transmission cooler flow is routed through the cooler, significantly reducing transmission temperatures and extending transmission life. Featuring a durable billet aluminum filter coupler and clamp plate, this upgrade prevents costly transmission damage caused by overheating and severe wear over time. The complete installation kit includes the ATS Thermal Bypass, cooler block, billet filter coupler, and coupler o-rings for a straightforward, reliable installation. It ensures optimal cooling efficiency in all conditions without compromising warm-up times, backed by ATS Diesel Performance’s innovative and durable diesel solutions.