A/C & Heat Bulkhead 4-Port Black

The A/C & Heat Bulkhead 4-Port Black from Billet Specialties is a precision-engineered coolant distribution manifold designed for custom hot rod and high-performance engine builds where space is critical and aesthetic integration matters. This component serves as a central hub for routing coolant lines from your engine block to the heater core, air conditioning condenser, and radiator bypass circuits in a compact aluminum casting.

Manufactured from billet aluminum and finished in satin black anodized, the bulkhead provides a clean, professional appearance that complements modern engine compartment layouts. The four-port configuration simplifies coolant flow management, reducing installation complexity and improving coolant distribution efficiency. The compact footprint—measuring 5.45 x 2.35 x 8.8 inches—permits installation in tight engine bays without sacrificing functional flow capacity.

At just 0.57 pounds, the lightweight construction adds negligible weight while maintaining structural rigidity under pressure and thermal cycling. This bulkhead is ideal for fabricators and enthusiasts building LS-swapped vehicles, street rods, or performance cruisers, ensuring a streamlined and efficient coolant routing solution.