S.P.M. Billet Aluminum Water Neck Thermostat Housing, 1-1/8 Inch Tall, Dual 3/8-18 NPT Ports, SBC/BBC Compatible (Machine Finish)

Upgrade your engine's cooling system with this premium S.P.M. Billet 6061 aluminum water neck thermostat housing. Precision-engineered for SBC (Small Block Chevy) and BBC (Big Block Chevy) applications, this 1-1/8 inch tall housing features dual 3/8-18 NPT ports, perfect for sensors, temperature gauges, or crossover lines. The housing accommodates standard 2-1/8 inch diameter thermostats and incorporates a dual O-ring seal design for superior leak prevention. Crafted from high-grade 6061 billet aluminum, this thermostat housing offers exceptional durability and heat dissipation. Available in both machine finish and black anodized options, this component combines functionality with sleek aesthetics. The thoughtfully designed NPT ports provide versatile mounting options for your engine monitoring equipment, while the precise machining ensures perfect fitment and reliable performance. This water neck represents the ideal blend of quality construction and practical engineering for your high-performance engine build.

• COMPATIBILITY: Designed for SBC/BBC engines, this thermostat housing fits standard 2-1/8 inch diameter thermostats with a compact 1-1/8 inch height
• CONSTRUCTION: Precision-machined from billet 6061 aluminum, available in machine finish or black anodized finish for durability
• DUAL PORTS: Features two 3/8-18 NPT threaded ports for versatile sensor, temperature gauge, or crossover line installation
• SEALING SYSTEM: Dual O-ring design ensures reliable, leak-free operation and proper coolant circulation
• INSTALLATION: Direct bolt-on design for small block and big block Chevy applications with all necessary mounting points