#52131071

FiTech 31071 Retro LS 650 HP Classic Gold EFI System Master Kit

Classic gold finish throttle body with 4150-style square bore flange bolts on like a traditional carburetor
Integrated 1 BAR MAP sensor, TPS, and IAC on throttle body for simplified installation and accurate engine management
Self-tuning ECU with built-in transmission control for GM 4L60/65/80E and compatible transmissions-no laptop required

$2,166.99

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Product Summary

Throttle Body Injection Style, 625 CFM CFM

Classic gold finish throttle body with 4150-style square bore flange bolts on like a traditional carburetor
Integrated 1 BAR MAP sensor, TPS, and IAC on throttle body for simplified installation and accurate engine management
Self-tuning ECU with built-in transmission control for GM 4L60/65/80E and compatible transmissions-no laptop required
Supports up to 650 horsepower with smooth idle, quick acceleration, optimized fuel efficiency, and better overall performance
Full master kit includes inline 255 LPH fuel pump, regulator, ECM, 80 lb/hr high-flow injectors, LS-specific sensors, pre-terminated harness, fuel filters, hoses, and hardware for plug-and-play Retro LS applications

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Key Specs

MFG. Part #	31071
Injection Style	Throttle Body
Injector Size	8 lb/hr
Max Horsepower Rating	625
ECM Included	Yes

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FiTech 31071 Details

The FiTech 31071 Retro LS 650 HP Classic Gold EFI System is a complete master kit engineered for LS engine swaps, retrofits, and upgrades. It features a classic gold carburetor-look throttle body with integrated 1 BAR MAP sensor, TPS, and IAC for clean, hassle-free wiring and precise control. This self-learning EFI setup includes built-in transmission control, a pre-terminated LS-specific harness, inline 255 LPH fuel pump with regulator, high-flow injectors, and all required sensors-providing effortless cold starts, automatic tuning, smooth shifting, crisp throttle response, enhanced drivability, and reliable power up to 650 horsepower on gasoline.

Classic gold finish throttle body with 4150-style square bore flange bolts on like a traditional carburetor
Integrated 1 BAR MAP sensor, TPS, and IAC on throttle body for simplified installation and accurate engine management
Self-tuning ECU with built-in transmission control for GM 4L60/65/80E and compatible transmissions-no laptop required
Supports up to 650 horsepower with smooth idle, quick acceleration, optimized fuel efficiency, and better overall performance
Full master kit includes inline 255 LPH fuel pump, regulator, ECM, 80 lb/hr high-flow injectors, LS-specific sensors, pre-terminated harness, fuel filters, hoses, and hardware for plug-and-play Retro LS applications

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.

CA Prop 65

CARB warning

FiTech 31071 Specifications

KEY SPECS
MFG. Part #	31071
Brand	FiTech
Injection Style	Throttle Body
Injector Size	8 lb/hr
Max Horsepower Rating	625
ECM Included	Yes

GENERAL
Fuel Injection System Type	Throttle Body Injection (TBI)
CFM	625 CFM
Injectors Included	Yes
Intake Manifold Included	No
Fuel Rails Included	Yes
Wiring Harness Included	Yes
MAP Sensor Included	Yes
Sold in Quantity	Kit

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