Maintain the original OD φ148±0.1mm cast iron housing dimensions Shaft seal upgraded to KACO double lip dynamic seal structure Optional phosphate treatment surface (passed 720 hours salt spray test) Adaptable to OE No. 52088400AE, with special mounting guide pins for YJ model" Back of impeller deflector ribs design reduces the vortex loss by 22% Shaft core diameter increased to 20mm (18mm), bending strength increased by 45% Includes Dayco 95037 reinforced pulley assembly. Increased bending strength by 45% with Dayco 95037 reinforced pulley kit Adapted to OE No. 52088401AH.