Product Summary

Universal Fit, Multi-port Injection Style, User Tunable

  • Designed to fit the LS1/LS2/LS6 engines
  • Features billet Fuel rails with AN fittings and fuel crossover
  • Includes a self-learning ECU with touch screen controller for easy setup and configuration
  • Is 24X and 58X crank and cam compatible
  • Includes a custom wire harness (uses factory coil pack sub harness)

Key Specs

MFG. Part #70007

Need To Know

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The Ultimate Tall LS1/LS2/LS6 500HP Intake Manifold Kit with 92mm throttle body and trans control are a complete self-tuning induction systems for LS engines designed for the do-it-yourself hot rodder to the professional EFI tuner! This system is ready to go with everything needed to complete the induction system of your LS engine and get you on the road easily and faster than any system on the market today. Forget sourcing mismatched parts and cutting and splicing old harnesses and re-flashed ECU’s from “Craigs List” tuners. FiTech’s Ultimate EFI is a complete Kit. Suitable for that junkyard 5.3 to a stroker 427, we have you covered! Check out the list of features and you will wonder why it’s never been so simple to ditch that old factory hardware or top off that fresh long block. We have taken the work out of getting your new or pull-out LS up and running in a flash. That’s why we call this intake manifold kit the Ultimate EFI.

This intake manifold Kit comes with electronic transmission control. This option is used when operating a GM electronically controlled automatic transmission. The Ultimate LS ECU has the ability to control the shift point, shift firmness, when to downshift properly, and all other features involved when controlling the transmission. This feature is suitable for 4L60, 4L65, 4L80 or 4L85 GM transmissions. If using transmission control connect the two sides of the trans connector to the sub-harness and connect this to the connector on the transmission. Once connected to the transmission you are ready. If not using transmission control leave the connectors untouched.


• Tall, 92mm inlet, Fabricated 3mm thick aluminum sheet metal TIG welded intake manifold with 1500-6500 rpm power-band up to 500 HP to the flywheel.
• Billet Fuel rails with AN fittings and fuel crossover.
• Self-learning ECU with touch screen controller for easy setup and configuration.
• Sequential fuel and spark control with individual cylinder trim.
• Bosch wide band controlled (Self-learning).
• Stainless O2 Sensor bung (clamp or weld on).
• 24X and 58X crank and cam compatible.
• TPS - IAC Sensor.
• Tach output driver for most tachometers (5V).
• Output driver for most speedometers.
• Compatible with car and truck coils.
• On the fly programmable target AFR and timing (if desired).
• 36 lb/hr flow-matched injectors.
• Fuel pump relay output.
• Custom wire harness (uses factory coil pack sub harness).
• Transmission control feature is suitable for 4L60, 4L65, 4L80 or 4L85 GM transmissions




Intake manifold will fit Cathedral Port LS1/LS2/LS6 heads. Transmission control feature is suitable for 4L60, 4L65, 4L80 or 4L85 GM transmissions. Small Block V8 GEN. III/IV LS-based Chevrolet street and performance engines with a 1500-6500 rpm power-band up to 500 HP to the flywheel.

  • 4.8 L / 293 c.i. LR4, LS1, LS2, LS6, V8 Camaro/Corvette
  • 5.3 L / 325 c.i. L33, L59, LM4, LM7, V8 Camaro/Corvette
  • 5.7 L / 346 c.i. LS1, LS6, Cadillac CTS V, Pontiac GTO/Trailblazer SS/Firebird/Trans-Am, SSR, Corvette
  • 6.0 L / 364 c.i. LQ4, LQ9, LS2, V8 Camaro/Corvette
  • Intake manifold height is 9 inches
  • 92mm high flow cable operated throttle body sits at 7 degrees
  • Throttle body will clear any stock truck accessories depending on the type of water pump, if there is truck water pump accessory clearance interference you will need to get a new water pump bracket

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.


MFG. Part #70007
Injection StyleMulti-port
User TunableYes
Self TuningYes
Injectors IncludedYes
Injector Size36 lbs./hr.
Intake Manifold IncludedYes
Intake Section IncludedComplete
Metering StyleSpeed Density and Speed Throttle
Throttle Body IncludedYes
Throttle Body MaterialBillet Aluminum
Throttle Body FinishAnodized
Intake MaterialAluminum
Intake FinishAnodized
Venturi Quantity1
Fuel Pump IncludedYes
Fuel Rails IncludedYes
Calibration Module IncludedYes
ECM IncludedYes
Wiring Harness IncludedYes
Fuel Pressure Regulator IncludedNo
Distributor IncludedNo
MAP Sensor IncludedYes
IAC Motor IncludedYes
IAT Sensor IncludedYes
TPS Sensor IncludedYes
Use with Power AdderNo
Venturi Diameter92.00mm
Max Horsepower Rating500
GTIN Code854549007477
Sold in QuantityKit