The PK1853 CBR style high volume pump kit is a direct replacement for 07-11 3.8L JKs. Greatly improves steering performance and is a must for cylinder assist systems. Pumps are 50 percent more volume than factory. Use Swepco 715 Power Steering Fluid in all PSC Systems. Note: It is recommended to mount the reservoir so the fluid level remains above the level of the pump and that the hose the supplies fluid back to the pump from the reservoir not exceed 16”. If the pump supply hose exceeds the 16” you could possibly create a vacuum situation that will create aeration in the pump. This will results in a noisy, whining pump that will eventually fail.