New electronic throttle bodies are now available for the EFI Connection 24x system. Available sizes are 52mm, 58mm, and mono-blade. These can also be used with an LS1 engine if the intake manifold accepts the dual bore TPI/LT1 type throttle body.


TAC Module and Pedal
These throttle bodies are designed to be used with the LS1/LS6 Corvette TAC module. The LS1/LS6 Corvette throttle body motor and TPS are used with this new design.

Throttle body ID plates are available separately for cable driven throttle body applications.


Testing the first throttle body was a complete success! We pulled the RamJet 350 manifold with LS1/LS6 Corvette throttle body to swap in a TPI manifold with the first 52mm electronic TPI/LT1 throttle body. By tweaking {B4349} ETC Throttle Area Conversion for the change in throttle bore, {B4603} Desired Idle Speeds, and a few Throttle Cracker values, the vehicle drives just as it did with the 78mm LS1/LS6 Corvette throttle body. Integrated cruise control is beautiful and seamless with no vacuum lag. And with a 4L60E and all wheel drive system, this truck has never driven so well. The street manners are smooth and with the pedal to the floor it pulls hard.