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" 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 triggers the magnetic pick-up mounted in the housing. This high output magnetic pick-up is the most accurate way to trigger 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.
Features:
- 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
Specification:
- Brand: MSD
- C.A.R.B. EO #: D-40-39
- Color: Red
- Distributor Type: Magnetic Pickup
- Emission Code: 1
- Product Type: Distributor
- Warranty: Limited 1 Year Warranty
- Part Number: 85551
Fitment:
- 1975-1986 CHEVROLET BEL AIR
- 1975-1986 CHEVROLET C10 SUBURBAN
- 1975-1986 CHEVROLET C20 SUBURBAN
- 1975-1986 CHEVROLET CAMARO
- 1975-1986 CHEVROLET CORVETTE
- 1975-1986 CHEVROLET G10
- 1975-1986 CHEVROLET G30
- 1975-1986 CHEVROLET K10
- 1975-1986 CHEVROLET K20
- 1975-1986 CHEVROLET K30
- 1975-1986 CHEVROLET LAGUNA
- 1975-1986 CHEVROLET MONTE CARLO
- 1975-1986 CHEVROLET NOVA
- 1975-1986 CHEVROLET C10
- 1975-1986 CHEVROLET C20
- 1975-1986 CHEVROLET C30
- 1975-1986 CHEVROLET CAPRICE
- 1975-1986 CHEVROLET EL CAMINO
- 1975-1986 CHEVROLET G20
- 1975-1986 CHEVROLET IMPALA
- 1975-1986 CHEVROLET K10 SUBURBAN
- 1975-1986 CHEVROLET K20 SUBURBAN
- 1975-1986 CHEVROLET K5 BLAZER
- 1975-1986 CHEVROLET MALIBU
- 1975-1986 CHEVROLET MONZA
- 1975-1988 GMC C15
- 1975-1988 GMC C1500
- 1975-1988 GMC C25
- 1975-1988 GMC C2500
- 1975-1988 GMC C35
- 1975-1988 GMC CABALLERO
- 1975-1988 GMC G1500
- 1975-1988 GMC G2500
- 1975-1988 GMC G3500
- 1975-1988 GMC K15
- 1975-1988 GMC K1500
- 1975-1988 GMC K25
- 1975-1988 GMC C15 SUBURBAN
- 1975-1988 GMC C1500 SUBURBAN
- 1975-1988 GMC C25 SUBURBAN
- 1975-1988 GMC C2500 SUBURBAN
- 1975-1988 GMC C3500
- 1975-1988 GMC G15
- 1975-1988 GMC G25
- 1975-1988 GMC G35
- 1975-1988 GMC JIMMY
- 1975-1988 GMC K15 SUBURBAN
- 1975-1988 GMC K1500 SUBURBAN
- 1975-1988 GMC K25 SUBURBAN
- 1975-1988 GMC K2500
- 1975-1988 GMC K35
- 1975-1988 GMC SPRINT
- 1975-1988 GMC K2500 SUBURBAN
- 1975-1988 GMC K3500
Emissions:
This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.
The following vehicles are considered Emissions Controlled Vehicles:
- 1966 and newer U.S. manufactured California Certified vehicles
- 1968 and newer U.S. manufactured Federally Certified vehicles
- 1968 and newer Foreign manufactured vehicle
- C.A.R.B. EO #D-40-39