Ultimate Sync
Dual Quad EFI Systems- Stand alone

$1,995.00

HP max rating based on naturally aspirated gasoline.

Reduced capacity for:

-Using E85 reduce 30%

-Power Adder reduce 18%

California Prop 65 Warning

This product falls under the following Emissions Category:

See Emissions Details

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WARNING: Hazardous Material Warning Close WARNING: This product can expose you to chemicals including Nickel Acetate, Chromium, Lead, Lead Compounds, Nickel (Metallic), Nickel Compounds, Diisonyl Phthalate (DINP) and Toluene which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65warnings.ca.gov.

Complete automotive wiring harness kit with connectors and accessories.

Description

Ultimate Sync Dual Quad EFI System

Standalone | Small Block Chevy | No Intake Included

The Ultimate Sync Dual Quad Standalone EFI System is designed for builders who already have a dual quad intake or are running a custom manifold setup and want the control, drivability, and performance of FiTech’s Ultimate Sync EFI without purchasing an intake they do not need. Developed by FiTech Fuel Injection, this system delivers classic dual quad appearance with modern fully sequential electronic fuel injection.

Each system includes dual Classic style throttle bodies, an external ECU with full timing control, main wiring harness, and dual wideband oxygen sensors. FiTech’s self learning technology continuously adjusts fueling in real time to deliver smooth idle, crisp throttle response, and consistent performance across a wide range of driving conditions.

This standalone configuration is ideal for performance street, strip, and custom builds. It is boost and nitrous compatible, supports E85 fuel, and is available with or without electronic transmission control for late model GM automatic transmissions. A Dual Sync Hall Effect distributor is required for proper operation.

Intake manifold not included.

Every Ultimate Sync EFI system is backed by FiTech’s industry leading 3 Year Limited Warranty.

Horsepower Options and Key Differences

500 HP Configuration

  • Supports mild street builds up to 500 horsepower

  • 36 lb/hr fuel injectors

  • Ideal for cruisers, resto mods, and traditional hot rod applications

  • Optimized for smooth drivability and easy tuning

750 HP Configuration

  • Supports performance street and strip builds up to 750 horsepower

  • 55 lb/hr fuel injectors

  • Increased fuel capacity for higher compression or moderate power adders

  • Excellent balance of drivability and top end performance

1000 HP Configuration

  • Supports high output builds up to 1000 horsepower

  • 80 lb/hr fuel injectors

  • Designed for aggressive naturally aspirated, boosted, or nitrous combinations

  • Maximum airflow and fuel delivery for serious performance applications

Transmission Control Options

Without Transmission Control

  • EFI and timing control only

  • Ideal for manual transmissions or externally controlled automatics

With Transmission Control

  • Integrated electronic transmission control

  • Compatible with select late model GM automatic transmissions including 4L60, 4L65, 4L80, and 4L85

  • Clean single ECU solution for engine and transmission management

Finish Options

  • Classic Gold throttle bodies

  • Black throttle bodies

Common Features Across All Standalone Configurations

  • External ECU with full timing control

  • Dual wideband O2 sensors

  • Dual quad throttle body setup

  • 3 Bar TMAP sensor

  • Fan control and A/C input

  • Pro tuning laptop software

  • Boost and nitrous compatible

  • E85 compatible

  • Requires Dual Sync Hall Effect distributor

  • Intake manifold not included

Dual Sync HE distributor required. FiTech #99565 sold separately.

Additional information

Throttle Body Finish:

Black, Gold
Maximum Horsepower:

1000 HP, 500 HP, 750 HP
Transmission Control:

No, Yes