PSC Big Bore HD Cylinder Assist Steering Kit, 18+ Jeep Wrangler JL 3.6 PSC Motorsports Jeep Wrangler Bolt On Cylinder Assist Mounting Bracket Cylinder Assist Kit Bolt On OE Axle 1.375 Tie Rod 12 18 Wrangler JK 3.6L PSC Steering Detroit Axle Front 8pc Suspension Kit for 07 17 Jeep Wrangler, 18 PSC Motorsports Jeep Wrangler EHPS Cylinder Assist Steering Kit for OE. PSC Cylinder Assist Steering Kit with the Big Bore XD steering gear for the 2012 18 Jeep Wrangler JK JKU 3. 6L Pentastar engine, OE axles and larger than 35 inch tires, 6. 75 Inch stroke cylinder, bolt on cylinder mount, 1. 375 Inch diameter Tie Rod clamp