GM X-Body TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Modernize the performance and efficiency of your GM X-Body with our PerfectFit™ Transmission Kits. Whether you’re building a Chevy II, Nova, Ventura, Apollo, or Omega, we offer the industry’s premier overdrive solutions. Choose from the streamlined TKX 5-Speed, the high-torque Magnum 6-Speed, or our smooth-shifting A41 4L60E Electronic Automatic.
 

Our X-Body kits are meticulously engineered to provide a seamless fit into your classic chassis, delivering significantly reduced highway RPMs and a transformed driving experience. From the compact early Nova tunnels to the later 70s models, our systems arrive as a total solution, featuring all the high-quality components required for a professional installation that preserves your factory interior aesthetics and shifter location.