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EFI Kit, Base, FiTech Ultimate LS EFI
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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, 750 or 1,000 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. 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 500 HP setup uses a 92 mm throttle body; 750 and 1,000 HP versions use 102 mm. Match the actual port, intake-height and output combination before ordering.
• LS1/LS2/LS6, LS3/L92 and LS7 port choices • 500, 750 or 1,000 HP system options • Tall cathedral-port truck-intake option • 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
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