An inter-changeable crank shaft pulley system for the very popular Ford Lightning and Harley Davidson trucks. System frovides 2, 4, 6 or 8 lbs of boost gain and reducing reciprocating weight by nearly 9 lbs!

Features:
• CNC machined 6061-T6 aluminum hub and two pulley rings. your choice of 2, 4, 6 or 8 lbs Pulley Rings.
• Beautiful Black anodized for long lasting surface protection and STEALTHY appearance.
• Grade 8 bolts and speacial rib washers provided
• Expect 2, 4, 6 or 8 lbs of boost at WOT
• OEM serpentine belt may be used, tensioner will be at limit.
• Optional longer belt numbers included with instructions.
• Special torque converter locking tool and 14mm hex socket included.
• Additional tools required include 1/2" drive, 36" long breaker bar, 13, 14, and 15mm wrenches.
• Changeover takes approx. 1 to 1 1/2 hours.
• Once installed, pulley rings change in 10 minutes or less with minimum tools.