MSD Pro-Billet Crank Trigger Distributor (MSD8558)

MSD8558 - CRANK TRIGGER DISTRIBUTOR CHEV

Small/Big Block Chevy, Tall Block, Low Profile, Adjustable Slip Collar

Part Number: MSD8558

Designed to fit low in the block to clear firewall and intake combinations
CNC machined billet aluminium housing and Dupont Rynite base
Oversized polished steel shaft with a QPQ coating for friction reduction
Shaft is guided by a sealed ball bearing and an extra long sintered bushing
Special oil tract improves lubrication to the distributor and cam gear

O-ring seals can be added to modified blocks to improve oil pressure control
Must be used with an MSD Crank Trigger and MSD Ignition Control
Supplied with large diameter HEI style distributor cap and rotor
Supplied with bronze gear
The MSD Billet Crank Trigger Distributors are designed for racing engines that use a crankshaft triggered ignition. Since most race engines use custom tunnel rams or blowers that limit the space for a distributor, th ese Crank Trigger tributors are designed to fit in tight quarters and still accurately deliver the sparks.
Crank Trigger Distributors are designed to be used with a crank trigger only. The distributors have no magnetic pick-up or advance assemblies.
The unique design of these distributors fit tight intake systems while still transferring the high voltage of the MSD racing ignition to the spark plugs. The high voltage carrying capabilities are the result of several features which have been designed into these Low-Profile Distributors. This includes a large diameter cap with wide spaced terminals and an injection moulded Rynite rotor with thick vanes to stir up the air inside the cap. The high dielectric Rynite base also prevents arcing to the billet housing.
Since these distributors are used primarily in racing applications, an oversized steel shaft is responsible for delivering the sparks. This shaft is QPQ-coated for friction reduction and receives guidance from a sealed ball-bearing assem bly on sintered bushing for smooth operation.
NOTE: Must be used with an MSD Crank Trigger and Ignition Control.