MSD SBC/BBC Pro-Billet Distributor - Iron Melonized Gear (Requres MSD Ignition Control)

Features:
Will not accept a vacuum advance canister
O-ring seals can be added to modified blocks to improve oil pressure control
Must be used with an MSD Ignition Control
Mechanical advance assembly can be locked out for crank trigger systems
Advance weight pins are staked and tig welded to the plate
Polished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushing
Special oil tract improves lubrication to the distributor and cam gear
Nylon pads ensure smooth operation of the advance weights
Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction
Easy-to-adjust mechanical advance with supplied springs and stop bushings
CNC machined billet aluminum housing and billet aluminum base
Supplied with an HEI style distributor cap and rotor (accepts Cap-A-Dapts)
Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range

Specs:
Part Number: MSD-85551
Distributor Cap Included: Yes
Distributor Cap Style: Male/HEI
Distributor Cap Type: Small cap
Ignition Coil Included: No
Ignition Module Included: No
Computer-Controlled Compatible: No
Trigger Style: Magnetic
Advance Type: Mechanical
Ignition Box Required: Yes, MSD 6,7 or 8 series
Mechanical Tach Drive: No
Slip Collar: No
Distributor Gear Material: Iron Melonized
Distributor Gear Rotation: Standard
Distributor Cap Color: Red
Housing Material: Aluminum
Housing Finish: Natural
Marine Use: No
Notes: Distributor is 6.937 in. tall from engine to top of distributor cap