Holley EFI Terminator 550-608 LS MPFI Kit for GM LS1/LS6 Engines with 24x Crank ReluctorGM LS1 LS6 Engines with 24x crank reluctor, No Laptop Required, 3. 5" Touchscreen Included Get all the great features of Terminator self tuning EFI in a bolt on system for GM's popular LS engines! The 550 608 kit controls fuel and spark through the Terminator's new 3. 5" touchscreen! Install, answer a few basic questions and drive. No laptop required! Features: For GM LS1 LS6 engines with 24x crank reluctor Kit includes everything you need to control