Transmissions & Drivetrain

Holley GM LS Engine 6-Bolt to Tremec T-56/Magnum Transmission Installation Kit 319-510 Everything you need to connect a 6-Bolt LS Engine to a Tremec T-56 or Magnum Transmission These Holley Transmission Installation Kits come complete with...

Holley EFI GM F-Body T-56 Transmission Harness for Terminator X Max ECU   F-Body T-56 Transmission Harness for use with Terminator X Max ECU's on V3 Build 100, or Holley EFI V6 Build 300, or later.   F-Body T-56 Transmission Harness -...

Holley EFI GM T-56 Magnum Transmission Harness for Terminator X Max ECU  T-56 Magnum Transmission Harness for use with Terminator X Max ECU's on V3 Build 100, Holley EFI V6 Build 300, or later.   T-56 Magnum Transmission Harness - Terminated...

Holley EFI CAN to USB Dongle - 8' Communication Cable 558-443 Compatible w/ Holley EFI, Sniper EFI, and Terminator X Software The CAN to USB communication cable provides the user with real tuning time access to the ECU. This cable can be used...

Holley Sniper EFI Transmission Control Kit w/ 3.5" Handheld - For GM Carbureted Applications  For Carbureted applications - includes 3.5" Handheld. The Sniper Transmission Controller (STC) is designed for common GM and Ford electronic 4-speed...

Holley Sniper EFI Transmission Control Service Unit GM 4L60/70/80E  Service Part Only (Handheld not included) The Sniper Transmission Controller (STC) is designed for common GM and Ford electronic 4-speed transmissions. Three part numbers cover...

Holley Sniper 2 EFI Transmission Control Kit  For Sniper 2 based applications (Handheld not included) The Sniper Transmission Controller (STC) is designed for common GM and Ford electronic 4-speed transmissions. Three part numbers cover a...

Holley Sniper 1 EFI Transmission Control Kit  For Sniper 1 based applications (Handheld not included) The Sniper Transmission Controller (STC) is designed for common GM and Ford electronic 4-speed transmissions. Three part numbers cover a complete...

Holley GM LS Engine 6-Bolt to Tremec TKX/TKO Transmission Installation Kit 319-504 Contains everything you need to connect a 6-Bolt LS Engine to a Tremec TKX or TKO Transmission These Holley Transmission Installation Kits come complete with...

Holley Terminator X Max GM 6L80/90 Transmission Control Kit 558-499 For use with Terminator X MAX ECU's, requires Terminator X V3 Build 100 or later firmware. Add GM 6L80/90E transmission control to any existing vehicle utilizing a Terminator X Max...

Holley GM LS T-56 Clutch Installation Kit 6 Bolt 319-575 This Kit includes all the hardware and components needed for a complete clutch install on a 6-bolt crank LS engine using a T-56 transmission. A 12-inch organic disc with 6 spring helix sprung hub...