The MSD Black Pro-Billet Chevy HEI distributor delivers the same performance as MSD's standard Pro-Billet HEI — designed to replace GM HEI distributors using a 4-pin ignition module — in a sleek black anodized finish. It's supplied with MSD's Digital HEI Module and HEI Coil for strong spark energy with improved dwell and timing control. Tig-welded atop the shaft is MSD's adjustable centrifugal advance assembly, with a supplied curve kit of springs and stop bushings, plus a vacuum advance for economy. The CNC-machined billet housing comes complete with a cap, rotor, coil cover, and heavy-duty gear.
Specifications:
- Color: Black Anodized
- Distributor Type: Ready To Run
- Gear Material: Cast Iron Melonized QPQ Coated
- C.A.R.B. EO #: D-40-39
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 83653
Designed to replace GM HEI distributors that use a 4-pin ignition module.
Compliance: This distributor carries California Air Resources Board (CARB) Executive Order EO# D-40-39, making it legal for sale and use on Emissions Controlled Vehicles in all 50 states when installed per MSD's application guide.
FAQ
What distributors does the MSD 83653 replace?
Like the standard Pro-Billet HEI, it's designed to replace GM HEI distributors that use a 4-pin ignition module.
Is the MSD 83653 CARB legal?
Yes, it carries CARB Executive Order EO# D-40-39.
What's included with the 83653?
A cap, rotor, coil cover, and heavy-duty gear, plus MSD's Digital HEI Module and HEI Coil.
What finish does the 83653 have?
A black anodized CNC-machined billet aluminum housing.

