Description
Comparison points and tradeoffs
When comparing MSD 85555 Pro-Billet Distributor Black with other Distributors options, use this source-backed detail as the primary discriminator: Category: Replacement Parts / Ignition Parts / Distributors & Parts / Distributors.
Use this second fact to evaluate the tradeoff: O-ring seals can be added to modified blocks to improve oil pressure control. A third point to compare across alternatives is: Will not accept a vacuum advance canister.
Alternative-selection boundary
Choose an alternative when its stated identifiers, application, package, or specifications better match the requirement; no unverified competitor claim is introduced here.
Complete source-backed product details
MSD 85555 Distributor
Source product highlights
- CNC machined billet aluminum housing and billet aluminum base
- Will not accept a vacuum advance canister
- Must be used with an MSD Ignition Control
- Supplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)
- O-ring seals can be added to modified blocks to improve oil pressure control




Phillip Carter –
Distributor works as described. My engine (383) now turn up past 6000 rpms with ease and no hesitation.