BRAND NEW SOUTHWEST SPEED POLISHED BILLET ALUMINUM WATER PUMP PULLEY WITH 1 V-BELT GROOVE THAT FITS BIG BLOCK CHEVYS WITH LONG WATER PUMPS. SOUTHWEST SPEED WATER PUMP PULLEYS ARE CNC MACHINED FROM FORGED 6061-T6 ALUMINUM FOR THE ULTIMATE IN STRENGTH AND BALANCE. DESIGNED FOR USE WITH V-GROOVE STYLE BELTS ON CHEVY ENGINES, EACH PULLEY IS POLISHED TO A MIRROR FINISH. FEATURES: BILLET ALUMINUM 6 7/16" DIAMETER POLISHED, MIRROR FINISH 1 V-BELT GROOVE FOR BIG BLOCK CHEVYS WITH LONG WATER PUMPS WHY USE A BILLET PULLEY?: THE BENEFIT OF A BILLET ALUMINUM PULLEY OVER A CAST PULLEY IS EQUAL DENSITY. WITH A CAST PULLEY, THE ALUMINUM IS POURED INTO A MOLD AND THEN ALLOWED TO COOL. THIS PROCESS CAN CREATE VARIATIONS IN DENSITY THROUGHOUT THE PULLEY. DENSE AREAS ARE HEAVIER THAN THE MORE POROUS AREAS CAUSING THE PULLEY TO VIBRATE AT HIGH RPM. SOUTHWEST SPEED PULLEYS ARE EQUALLY DENSE THROUGHOUT; EQUAL WEIGHT TRANSLATES TO A TRUE AND BALANCED PULLEY DRIVE SYSTEM. NOTE: THIS LISTING IS FOR THE PULLEY ONLY & DOES NOT INCLUDE MOUNTING HARDWARE.
