WELD V-Series 2.0 18 x 6" Wheel, Black (WE84B-1806258)WELD V SERIES 2. 0 18x6" BLACK 5 x 120; Bolt Circle with 2. 7" Backspace Part Number: WE84B 1806258 It contains a specialized blend of heat transfer agents and propylene glycol that improve the coolant's ability to transfer heat away from high temperature cylinder heads. Operating temperatures of engines are reduced by up to 14F compared to the conventional glycol based coolant. This increases the density of the air fuel mix and allows ignition timing