At JASPER, we understand the pride and satisfaction that accompanies classic car ownership. Our staff of the JASPER Authentic Custom Drivetrains Division share the same feelings in the quality of their work, making sure that you are satisfied with every detail of this exciting experience. We offer custom remanufacturing for gas engines, transmissions and differentials. Authentic gas engines include a numbers-matching build, original paint, testing and, upon request and for an additional charge, valuable documentation of the remanufacturing process. With experience dating back to 1942, the latest technology and our passion for perfection, you can expect only the best from a Jasper Authentic Custom drivetrain.