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MSD

MSD 8503 E-Curve Pro-Billet Distributor

Part # 8503 Be the first to write a review

Compatible with Ford® 289/302. This product is not created or sold by Ford®. Set the timing curve with a twist of a rotary dial!

MSD 8503 E-Curve Pro-Billet Distributor

Estimated Ship Date: 06/17/2026
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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

See Emissions Details
The E-Curve Distributor features a digital control module that manages the timing curve replacing the centrifugal advance springs and weights. This module lets you select from nearly 100 different advance curves, including a vacuum advance by turning two rotary dials! You can also set an rpm limit that will protect your engine from over-rev damage caused by a missed shift or driveline failure.

These distributors are also fit with a high-output ignition module so there is no need to run an external ignition box. This combination makes these distributors ideal for restored muscle cars and street rods to keep a stock or clean appearance under the hood.

Features:

  • Digitally controlled, stand-alone distributor
  • Adjustable electronic advance with vacuum advance
  • Select up to 100 different curves through two rotary dials
  • High output ignition module for a powerful spark
  • Set a rev limit to protect your engine from overrev damage
  • Simple three wire connection and you're ready-to-run
Brand MSD
Emission Code3
Product TypeDistributors
WarrantyManufacturer's Limited 1 Year
UPC085132085033
Manufacturer Part Number8503
Part Number8503
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Instructions for Part# 8503
Gear Lube Addendum
Rev Limiter Addendum
Supply Voltage Addendum
Manufacturer's Limited 1 Year: See Details
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    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.