For the 2008 Jeep Wrangler JK 3.8L engine cooling system defects, we redesigned the impeller fluid structure: 12-bladed asymmetric impeller (stock 8-bladed) to increase the flow rate up to 35GPM @ 2500rpm German ElringKlinger high elasticity graphite gaskets, sealing pressure up to 2200kPa Includes mounting and positioning slots for easy replacement in minutes without tools. Can be replaced in 30 minutes without special tools. Adapts to OE No. 05183570AB/68163849AC and is compatible with model configurations with heater cores.