The popular Mr. Gasket GM LS water necks are now available in black or a polished aluminum finish. The mounting holes on these water necks are slotted to fit all model years of the GM LS Series engines. Choose from the 30 degree swivel style or a straight water neck. These water necks match the new black and polished accessory drive brackets and are Ideal for use in engine swap applications.
GM LS Water Necks
Choose From Swivel or Strait Style Water Necks
Black, or Polished Aluminum Finish
Fits All 1997-’15 GM LS Series Engines – Revised Design w/ Slotted Mounting Holes
Stainless Steel Mounting Bolts Included
Fits 1-1/2” Radiator Hose
Must Be Used w/ 2004-’08 Thermostat (i.e. Part #6367 160 degree, or # 6368 180 degree)
New Finish to Match Black or Polished Accessory Drive Brackets
Ideal for Engine Swap Applications
NOTE:Must Be Used w/ 2004-’08 GM LS Thermostat (i.e. #6367 160 degree, or # 6368 180 degree). (for 2670BK & 2670NA only) Make sure the small air bleed port (located at the tab in the gasket) on the thermostat is facing upward. If necessary, the small tab can be cut off the gasket and thermostat rotated to move this air bleed to the top (this will allow any trapped air to escape). This will only be necessary when the swivel is moved a significant amount vs. the stock water neck.