SBC Water Header

The SBC Water Header from Dedenbear is a purpose-built cooling component engineered for Small Block Chevy engines undergoing performance modifications. Whether you're building a street machine, drag racing platform, or high-output cruise car, this water header replaces the factory cast-iron unit with a lightweight, optimized design that improves coolant flow dynamics and reduces underhood weight. It's the go-to upgrade for enthusiasts who demand better thermal management without sacrificing reliability or fitment.

Constructed as an aluminum water header assembly, this component bolts directly to the cylinder head and directs coolant to the radiator with superior port geometry compared to OEM iron pieces. The internal passages are designed to minimize dead spots and promote laminar flow, which keeps cylinder head temperatures even during sustained high-RPM operation or aggressive throttle cycles. At just 2.85 pounds, the weight savings contributes to front-end weight reduction—a critical factor in balanced handling and launch characteristics. The compact footprint (10 x 4.1 x 13.2 inches) ensures clearance around common intake manifolds and mechanical fuel pumps, making installation straightforward on modified engine bays.

SBC enthusiasts running carbureted or fuel-injected small-blocks benefit most from this header, especially those pairing it with upgraded radiators, electric water pumps, or tight engine compartment configurations. The design accommodates both street and competition applications without modification. Installation is straightforward: drain the cooling system, unbolt the factory water neck, and secure the new header using the existing fastening points. Combine it with a quality coolant hose kit and a properly tuned fan setup for optimal results across idle, cruise, and full-throttle scenarios.