EFI Kit, Master, FiTech Ultimate LS EFI, Force Fuel Sys

GM LS Ultimate LS Master EFI Kit with Force Fuel by FiTech®

Sequential EFI, individual-cylinder trim and optional transmission control coordinate the LS conversion.

This FiTech® Ultimate LS system combines a sheet aluminum intake, cast throttle body, injectors, rails and self-learning electronic control. Select the cylinder-head port style, 500 or 750 HP rating and transmission-control option; a tall cathedral-port intake option accommodates the truck accessory drive. The intake targets a 1,500-6,500 rpm range; 500 HP versions use a 92 mm throttle body and 750 HP versions use 102 mm. Self-learning fuel control maintains the selected air/fuel target. Sequential fuel and spark control, individual-cylinder trim, factory knock-sensor input and 24x/58x crank-signal compatibility support tuning. A 3-bar MAP sensor supports boost up to 30 psi. Two programmable fan outputs, tach output, wideband oxygen sensing, a matched harness and handheld setup complete the controls. Transmission-control versions adjust shift points and firmness on compatible 4L60E/65E/80E/85E automatics. The Force Fuel package adds an underhood reservoir fed by the original pump, a submerged 340 LPH pump, built-in regulator, 5 feet of fuel hose, -6 AN fittings and a serviceable 10-micron filter. A tank return connection remains necessary.

• LS1/LS2/LS6, LS3/L92 and LS7 port choices • 500 or 750 HP system options • Tall cathedral-port truck-intake option • 92 mm (500 HP) or 102 mm (750 HP) throttle body • Intake operating range: 1,500-6,500 rpm • Sequential fuel/spark and individual-cylinder trim • 24x/58x crank signals; factory knock input • 3-bar MAP sensor; boost up to 30 psi • Two programmable fan outputs and tach output • Matched harness, wideband sensing and handheld • Optional 4L60E/65E/80E/85E transmission control • 340 LPH Force Fuel package included • Regulator, 5-foot hose and 10-micron filter