The Currie RockJock® high pinion 44 housing center is an all new, heavy duty center made 100% by Currie designed to directly replace a JK Rubicon's stock housing. Our casting is a heavy duty, ductile iron piece that uses the larger JK high pinion 44 gears only. These gears feature a larger ring gear than a standard 44 as well as a 29 spline Dana 60 size pinion gear. JK upper control arm bushing ear is cast onto the housing and ports for all factory Rubicon electronics are installed. Centers accept 3" tubes. This is fully machined housing center with carrier caps and cap bolts only. NOTES: JK/TJ/XJ upper control arm bushing ear is cast onto the housing but can be cut off upon request for leaf spring application vehicles for $89.95 - however it can be cut off by the customer or left on and not cause any issues. NOTES: This housing center weighs 58lbs. where a stock JK high pinion 44 front housing center weighs 34lbs. Accepts high ratio Dana 44 carriers only!