Description Reviews K1 Technologies H-Beam Connecting Rod are a matched set of 4 rods; w/ ARP 2000 Bolts (BT61501-2) #005EB16132 for you MINI Cooper S with the W11 Tri-Tech motor. K1 Technologies connecting rods offer world-class performance at an affordable price. Our race-ready connecting rods are made from 4340 forged steel, use premium bushing material and are hand finished in the USA. K1’s Engineering Team has decades of experience designing components for professional racing engines and designs each rod for demanding race applications. Don’t trust your engine to anything but K1 Rods! FEATURES: 4340 Forged Steel* - Strength, toughness and resistance to impact Proprietary ARP Bolts* - Asymmetrical threads Pin oiling* - Extra lubrication to minimize pin wear Heavy Radii* - Minimizes clearance without focusing stress in tight radii Thicker Blades* - Minimizes outward bowing at peak combustion pressure Rod Offset* - Center small end to bore center optimizes horsepower + / -.000050 (50 millionths) tolerance on big end housing bore** - Longer bearing life High tolerance center to center length (< .001”)* - Increased horsepower and efficiency Specifically engineered for demanding race applications* - Strength for high horsepower applications while keeping Rod Specs: BE Width: 23.3 Bolt Size: 3/8in Gram Weight: 474 Housing Bore: 49 Length: 131.5mm PE Width: 18.5 Pin Diameter: 21mm Note: Current lead time is very long due to Covid. Current wait time can be as low as a month to as long as four.