PISTON RINGS (8),ZERO GAP MOLY,4"+.040" Southwest Speed Tandem Cylinders F-85: 1964-1972 F-85

F-85: 1964-1972 F-85

DESIGNED FOR 4

SMALL BLOCK FORD 289-400

SOUTHWEST SPEED BOOSTER MOUNTING BRACKET SET (SOUTHWEST SPEED PART #300-7910): BRACKETS TO MOUNT THE BOOSTER DIRECTLY TO THE FIREWALL

DRONE ABATEMENT TECHNOLOGIES USED TO REDUCE CABIN RESONANCE

PISTON RINGS (8),ZERO GAP MOLY,4"+.040" Southwest Speed Tandem Cylinders F-85: 1964-1972 F-85ZERO GAP MOLY HIGH PERFORMANCE PISTON RINGS SPECS: *4" +. 040" BORE *1 16" TOP RING THICKNESS *1 16" MIDDLE RING THICKNESS *3 16" OIL RING THICKNESS DESIGNED TO STAND UP TO THE RIGORS OF RACING & HIGH PERFORMANCE STREET USE, WHILE PROVIDING LONG LASTING LIFE THESE RINGS FEATURE: *PLASMA COATED, BARREL SHAPED, DUCTILE IRON TOP RINGS THAT SEAL AGAINST BLOW BY WHEN THE PISTON ROCKS IN ITS BORE, *TAPERED SECONDARY RINGS THAT SEAL AGAINST THE OIL CONTROL