Overview Reviews Product Description Chevy LS1 45º Polished Aluminum Swivel Water Neck Thermostat Housing GM 2004-08\n\nThis is a 45 degree polished aluminum water neck for 2004, 2005, 2006, 2007, and 2008 Chevrolet / GM LS1 engines. Bolts included. Product Videos Custom Field Product Reviews Write a Review Write a Review × Pirate Mfg LS1 45 Degree Polished Aluminum Swivel Water Neck Thermostat Housing, Fits GM 2004-08 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *