B&M ShiftPlus Electronic Shift Improver Kit GM 4L60E, 4L80E # BM70380 Rate_12 particularly big cams that tend

particularly big cams that tend to reduce low-end power and torque

Spring loaded Gates belt tensioner ensures proper tension during hard acceleration and deceleration

Ford FE 390 - 428 V8 Engines 2 Groove Lower Crankshaft Pulley # BBFE2CR

Nut Included:Yes

B&M ShiftPlus Electronic Shift Improver Kit GM 4L60E, 4L80E # BM70380 Rate_12 particularly big cams that tendB&M ShiftPlus Electronic Shift Improver Kit GM 4L60E, 4L80E # BM70380 "Shift Improver, ShiftPlus Electronic, GM 4L60E, 4L80E, Each BM ShiftPlus Electronic Shift Improver Kits BM's ShiftPlus electronic shift improvers use vacuums or electronics to improve the characteristics of your transmission, and let you change settings as you drive. Great for performance, towing, and RV use, these shift improvers recalibrate your transmission in one of two ways: