This fitting is machined from billet aluminum and anodized black for a smooth durable finish. Use this fitting to connect your Hybrid Racing lower K-Series Adjustable Thermostat Housing to your radiator using AN fittingsThis fitting is specifically designed to work with our housing. It includes the correct compliant o-ring to prevent leaks or corrosion. Sold separately or this part can be purchased with the HYB-TSA-01-01 product. *Thermostat housing not included*
