MSD's most popular performance distributor, now available with a black cap featuring 316 stainless steel terminals. The billet aluminum housing is CNC-machined for exact tolerances, with a 0.500" QPQ-coated steel shaft supported by a sealed ball bearing and long sintered bushing.
Specifications:
- Category: Ignition
- Product Type: Distributor
- Distributor Type: Magnetic Pickup
- Gear Material: Cast Iron, Melonized QPQ Coated
- Cap: HEI-style Black Cap with 316 stainless steel terminals and rotor (accepts Cap-A-Dapts)
- Housing: CNC machined billet aluminum housing and base
- Warranty: Manufacturer's Limited 1 Year Warranty
- Part Number: 85557
Must be used with an MSD 6, 7, or 8-series ignition control. Apply a liberal amount of camshaft lubricant (supplied) to the distributor gear before installation.
FAQ
What's different about the MSD 85557's cap?
It's a black cap with 316 stainless steel terminals, unlike the standard red-cap version.
What ignition control does the 85557 require?
It must be used with an MSD 6, 7, or 8-series ignition control.
Is the MSD 85557 CARB legal?
No CARB Exemption Order Number is listed for this part.
Is lubricant needed for installation?
Yes, apply a liberal amount of the supplied camshaft lubricant to the distributor gear before installation.
Can this distributor accept a vacuum advance canister?
No, it will not accept a vacuum advance canister.

