MSD 8489 Billet Crank Trigger Distributor with Crab Cap for Chevrolet V8

The MSD 8489 is a low-profile, billet crank trigger distributor engineered specifically for high-performance and racing Chevrolet V8 engines running tunnel rams, blowers, or other induction systems that leave little room for a conventional distributor. Built with a CNC-machined billet aluminum housing and a DuPont Rynite base, this distributor sits low in the block to clear tight firewall and intake combinations. Must be used with an MSD Crank Trigger and an MSD 6, 7, or 8-Series Ignition Control.

Key Features:

• Low-profile crab-style distributor cap allows fitment in extremely tight engine bays — included with purchase along with a rotor and bronze gear
• 0.500" taller than standard Chevrolet distributors to accommodate extra-tall engine blocks
• Adjustable slip collar compensates for engines with modified deck heights or non-standard mounting surface-to-gear distances
• Oversized polished steel shaft with a QPQ (Quench-Polish-Quench) coating for reduced friction and long-term durability
• Sealed ball bearing and extra-long sintered bushing guide the shaft for precise, stable operation under racing conditions
• Special oil tract in the base directs oil to both the distributor and camshaft gears, reducing wear
• Two optional O-ring seals at the housing base can be added to modified blocks to prevent oil pressure loss
• Spark plug-style cap terminals provide a secure connection and positive grip on plug wires
• Country of Origin: USA

What's Included: MSD 8489 Billet Crank Trigger Distributor, low-profile crab-style distributor cap, rotor, and bronze gear.

Note: This is a racing-use-only component. It must be paired with an MSD Crank Trigger system and an MSD 6, 7, or 8-Series ignition control. Not legal for street use or emissions-controlled vehicles.