**8/24/2019- The Store is now open for purchases. Please review the Ordering Info page as there have been some changes to the site and policy.
R&D IDI Performance is dedicated to bringing the Navistar/IH 6.9 and 7.3 diesel into the modern world of diesel performance. Not only is it our goal to explore the realities of the platform but to maximize it, and take it to its limit. We provide the products to make that happen!