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MSD

MSD 85557 Distributor

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Key item features

Durable Construction: Features a CNC machined billet aluminum housing and base, with a .500 inch polished steel shaft that is QPQ coated for reduced friction and corrosion resistance.
Advanced Ignition Compatibility: Requires an MSD 6, 7, or 8 Series Ignition Control for operation, ensuring stable trigger signals across the entire RPM range.
Precision Components: Includes a maintenance-free magnetic pickup and a precision reluctor for accurate ignition timing, along with fine blanked chrome moly steel advance plates and weights.
Adjustable Performance: Equipped with an easy-to-adjust mechanical advance assembly, supplied with various springs and stop bushings to customize the advance curve.
Enhanced Lubrication: Incorporates a special oil tract to improve lubrication to the distributor and cam gear, and allows for O-ring seals in modified blocks for better oil pressure control.
Robust Cap Assembly: Supplied with an HEI style black cap featuring 316 Stainless Steel terminals and a rotor, also accepting Cap-A-Dapts for versatility.

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Specs

Vehicle model
85557
Vehicle make
Chevrolet
Vehicle fitment type
Specific
Automotive parts division
Performance
Brand
MSD
Automotive specialty part type
Distributor

Current price is $439.95

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Comparison Overview:
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Comparison Chart:
Vehicle model	85557MSD 85557 Distributor	23401MSDMSD 23401MSD Distributor	2362MSD 2362 Distributor	ElectraMSD 8552 Distributor	85505MSD 85505 Distributor	8570MSD Ignitions 8570 Pro-Billet Small Diameter Distributor	289MSD 84791 Distributor	V8MSD 8363 Distributor	8360MSD 8360 Distributor	2375MSDMSD 2375MSD Distributor
Vehicle make	ChevroletMSD 85557 Distributor	ChevyMSD 23401MSD Distributor	FordMSD 2362 Distributor	BuickMSD 8552 Distributor	MSD IgnitionMSD 85505 Distributor	-MSD Ignitions 8570 Pro-Billet Small Diameter Distributor	FordMSD 84791 Distributor	MSD IgnitionMSD 8363 Distributor	MSD IgnitionMSD 8360 Distributor	ChevyMSD 2375MSD Distributor
Vehicle fitment type	SpecificMSD 85557 Distributor	SpecificMSD 23401MSD Distributor	SpecificMSD 2362 Distributor	SpecificMSD 8552 Distributor	SpecificMSD 85505 Distributor	SpecificMSD Ignitions 8570 Pro-Billet Small Diameter Distributor	SpecificMSD 84791 Distributor	SpecificMSD 8363 Distributor	SpecificMSD 8360 Distributor	SpecificMSD 2375MSD Distributor
Automotive parts division	PerformanceMSD 85557 Distributor	PerformanceMSD 23401MSD Distributor	PerformanceMSD 2362 Distributor	PerformanceMSD 8552 Distributor	PerformanceMSD 85505 Distributor	PerformanceMSD Ignitions 8570 Pro-Billet Small Diameter Distributor	PerformanceMSD 84791 Distributor	PerformanceMSD 8363 Distributor	PerformanceMSD 8360 Distributor	PerformanceMSD 2375MSD Distributor

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About this item

Product details

Compatible with Small and Big Block Chevy®. This product is not created or sold by Chevy®. This is our most popular performance distributor! Must be used with an MSD 6, 7 or 8-series ignition.;

MSD's most popular performance distributor is now available with a black cap that includes 316 Stainless Steel Terminals. The housing is machined from a billet of 6061-T6 aluminum on a state-of-the-art CNC machine producing exact tolerances. For high rpm stability, a .500 in. steel shaft is supported by a sealed ball bearing and a long sintered bushing. This shaft also receives a QPQ coating for friction reduction and resistance to corrosion. A precision machined reluctor is attached to the shaft which reluctors the magnetic pick-up mounted in the housing. This high output magnetic pick-up is the most accurate way to reluctor your ignition. Plus, with no moving parts to wear or adjust, the pick-up is maintenancefree! Just above the pick-up is MSD's adjustable mechanical advance assembly.

Different springs and stop bushings are supplied so you can tune an advance curve to match your application. Must be used with an MSD 6, 7 or 8-series ignition.;

CNC machined billet aluminum housing and billet aluminum base
Will not accept a vacuum advance canister
Must be used with an MSD 6, 7 or 8 Series Ignition Control
Supplied with an HEI style Black Cap w/316 Stainless Steel terminals and rotor (accepts Cap-A-Dapts)
O-ring seals can be added to modified blocks to improve oil pressure control
Special oil tract improves lubrication to the distributor and cam gear
Nylon pads ensure smooth operation of the advance weights
Advance weight pins are staked and tig welded to the plate
Mechanical advance assembly can be locked out for crank trigger systems
Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
Polished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushing
Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range
Easy-to-adjust mechanical advance with supplied springs and stop bushings
No CARB Exemption Order Number

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Specifications

Vehicle model

85557

Vehicle make

Chevrolet

Vehicle fitment type

Specific

Automotive parts division

Performance

Warranty

Warranty information

90 Days

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