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MSD

MSD 85551 Distributor

4.8 stars out of 25 reviews

(4.8)|

25 ratings

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Key item features

Durable Construction: Features a CNC machined billet aluminum housing and base, with a polished steel shaft that is QPQ coated for reduced friction and corrosion resistance.
Advanced Lubrication: Incorporates a special oil tract designed to enhance lubrication for the distributor and cam gear, improving overall system longevity.
Precision Triggering: Utilizes a maintenance-free magnetic pickup and a precision reluctor to generate stable trigger signals across the entire RPM range.
Adjustable Advance: Equipped with an easy-to-adjust mechanical advance assembly, including supplied springs and stop bushings for custom tuning.
Robust Internal Components: Advance plate and weights are fine blanked from chrome moly steel and QPQ coated, with nylon pads ensuring smooth operation of the advance weights.
Versatile Compatibility: Compatible with Small and Big Block Chevy engines, and must be used in conjunction with an MSD 6, 7, or 8-series ignition control.

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Specs

Vehicle make
MSD Ignition
Vehicle fitment type
Specific
Automotive parts division
performance part
Brand
MSD
Automotive specialty part type
Distributor
Features
Adjustable

Current price is Now $367.95

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was $409.95

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$409.95

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Shipping, arrives by Fri, Feb 20 to Columbus, 43215

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Compare with similar items

Comparison Overview:
Product	Viewing this item MSD 85551 Distributor current price Now $367.95, Was $409.95 MSD 85551 Distributor 4.8 out of 5 Stars. 25 reviews	MSD 8276 Ignition Crank Trigger Sensor current price $123.25 MSD 8276 Ignition Crank Trigger Sensor 4.8 out of 5 Stars. 4 reviews	MSD 82131 Ignition Coil Mounting Bracket current price $14.52 MSD 82131 Ignition Coil Mounting Bracket 5 out of 5 Stars. 2 reviews	MSD 8745 Engine RPM Limiter current price Now $60.74, Was $75.42 MSD 8745 Engine RPM Limiter 5 out of 5 Stars. 4 reviews	MSD 8170 6-Pin Weathertight Connector - Each current price $35.40 MSD 8170 6-Pin Weathertight Connector - Each 5 out of 5 Stars. 1 reviews	MSD 33048 Spark Plug Boot Kit current price $42.80 MSD 33048 Spark Plug Boot Kit 5 out of 5 Stars. 1 reviews	MSD 7905 Generator Bracket current price $106.95 MSD 7905 Generator Bracket	MSD Ignition 8839 Ignition System Vibration Mount current price $23.01 MSD Ignition 8839 Ignition System Vibration Mount 1 out of 5 Stars. 1 reviews	MSD 8822 Ignition Kit current price $54.68 MSD 8822 Ignition Kit 5 out of 5 Stars. 1 reviews	MSD 3321 Spark Plug Boot Kit current price $20.01 MSD 3321 Spark Plug Boot Kit

Comparison Chart:
Vehicle make	MSD IgnitionMSD 85551 Distributor	MSD IgnitionMSD 8276 Ignition Crank Trigger Sensor	MSD IgnitionMSD 82131 Ignition Coil Mounting Bracket	MSD IgnitionMSD 8745 Engine RPM Limiter	-MSD 8170 6-Pin Weathertight Connector - Each	GMMSD 33048 Spark Plug Boot Kit	ChevroletMSD 7905 Generator Bracket	MSD IgnitionMSD Ignition 8839 Ignition System Vibration Mount	-MSD 8822 Ignition Kit	-MSD 3321 Spark Plug Boot Kit
Vehicle fitment type	SpecificMSD 85551 Distributor	SpecificMSD 8276 Ignition Crank Trigger Sensor	SpecificMSD 82131 Ignition Coil Mounting Bracket	SpecificMSD 8745 Engine RPM Limiter	SpecificMSD 8170 6-Pin Weathertight Connector - Each	SpecificMSD 33048 Spark Plug Boot Kit	SpecificMSD 7905 Generator Bracket	SpecificMSD Ignition 8839 Ignition System Vibration Mount	SpecificMSD 8822 Ignition Kit	SpecificMSD 3321 Spark Plug Boot Kit
Automotive parts division	performance partMSD 85551 Distributor	-MSD 8276 Ignition Crank Trigger Sensor	PerformanceMSD 82131 Ignition Coil Mounting Bracket	-MSD 8745 Engine RPM Limiter	PerformanceMSD 8170 6-Pin Weathertight Connector - Each	PerformanceMSD 33048 Spark Plug Boot Kit	PerformanceMSD 7905 Generator Bracket	-MSD Ignition 8839 Ignition System Vibration Mount	PerformanceMSD 8822 Ignition Kit	PerformanceMSD 3321 Spark Plug Boot Kit
Automotive specialty part type	DistributorMSD 85551 Distributor	-MSD 8276 Ignition Crank Trigger Sensor	-MSD 82131 Ignition Coil Mounting Bracket	-MSD 8745 Engine RPM Limiter	Ignition Coil ConnectorMSD 8170 6-Pin Weathertight Connector - Each	Spark Plug Boot KitMSD 33048 Spark Plug Boot Kit	Generator BracketMSD 7905 Generator Bracket	Ignition KitMSD Ignition 8839 Ignition System Vibration Mount	Ignition KitMSD 8822 Ignition Kit	Spark Plug Boot KitMSD 3321 Spark Plug Boot Kit

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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.;

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 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
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

info:

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Specifications

Vehicle make

MSD Ignition

Vehicle fitment type

Specific

Automotive parts division

performance part

Brand

MSD

Warranty

Warranty information

90 Days

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Warranty url

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Warnings

Warning Text

California Proposition 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.com

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Customer ratings & reviews

4.8 out of 5 stars

stars25 ratings14 reviews

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Apr 1, 2025

Steve 1969

5 out of 5 stars review