Product Summary

Multi-port Injection Style, 1,500-6,500 RPM Range

    Rebates Available

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    Key Specs

    MFG. Part #70073
    BrandFiTech
    RPM Range1,500-6,500
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    Need To Know

    Quick and Easy Returns

    Return Policy

    FiTech 70073 Details

    Loaded LS3 Aluminum Intake Manifold 500HP Kit, Black

    This Loaded LS3 aluminum intake manifold is a complete self-tuning induction systems for LS engines supporting up to 500HP. 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 ECUs from Craigslist tuners.

    FiTech Ultimate LS Loaded intake manifold kits are just like the systems, but without the ECU and hand-held controller.

    FiTech Ultimate LS Loaded intake manifold kits will have:

    • Low-profile 92mm inlet aluminum fabricated intake with 1,500 to 6,500 rpm powerband, 3mm construction, TIG-welded, black anodized with embossed FiTech logo
    • CNC-machined with O-ring gaskets and hardware included
    • High-flow cable operated 92mm throttle body
    • Parabolic inlet machining for smooth throttle transitions, same as OE
    • Throttle body features progressive linkage pulley with double-return spring and adjustable stop
    • Billet fuel rails with AN fittings and fuel crossover
    • 36 lbs./hr. flow-matched injectors

    Rebates

    FiTech Up To $500 Off Select Parts Summer Sale

    FitechSummerSale2026

    FiTech Fuel Injection is pleased to announce our Summer Performance Sale, running from July 1, 2026, through July 31, 2026. For a limited time, customers can save up to $500 across the FiTech lineup, making it the perfect opportunity to upgrade with high-quality EFI systems, fuel delivery, ignition, and accessories. The sale prices are applicable only to purchases made within the specified sale period, from July 1, 2026, to July 31, 2026. No rainchecks or exceptions will be provided. Sale price is valid through July, regular MAP Pricing will be reinforced on August 1, 2026. This sale cannot be combined with any other offers, discounts, or promotions. Co-ops will be honored.

    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.

    FiTech 70073 Specifications

    KEY SPECS
    MFG. Part #70073
    BrandFiTech
    RPM Range1,500-6,500
    GENERAL
    Injection StyleMulti-port
    Cylinder Head ConfigurationCathedral Port
    Throttle Body Bore Size92mm
    Intake Section IncludedComplete
    Base MaterialAluminum
    Throttle Body IncludedYes
    Injectors IncludedYes
    Aftermarket Fuel Rail RequiredYes
    Runners IncludedYes
    Runners RemovableNo
    Supplemental Bosses Cast-InNo
    Supplemental Bosses MachinedYes
    Supplemental Boss Quantity8
    Sold in QuantityKit
    NotesKit includes o-ring seals and hardware. For 500 HP LS3 engines.
    GTIN Code852192008520
    Multi-Port Fuel Rails IncludedYes

    Questions & Answers

    Fitment

    • GM LS3

    • GM LS3

    • GM LS3

    • GM LS3

    Customer Impersonation Script