TURN UP THE PRESSURE ON YOUR STOCK JEEP JL/JT ELECTRIC STEERING PUMP! With aftermarket performance parts and harder offroad use, the stock pressures and lack of cooling ability become an issue. We have found that the factory power steering is capable of running at a higher pressure with ease. The Apex Boost Kit allows for a retune of the factory blowoff valve so we can increase steering power by 40%. While this is good news, more power = more heat and the factory system was barely acceptable. This is why a power steering cooler is included. This boost kit MUST be used with a cooler to operate correctly. Customers who purchase the standalone kit are responsible for installing a compatible cooler. COMPATIBLE WITH JEEP JL AND JT - 2.0L, 3.6L, 392, AND DIESEL MODELS WHAT DOES THE STEERING BOOST KIT FIX? No more stalled steering when it’s sub-freezing temperatures. Smooth steering in parking lots on hot days. Proper steering feel while in sand dunes. Less feedback from terrain inputs. Easy steering while aired down. Overall it feels like stock but no more steering issues regarding power. [Note: this product is not designed to address steering slop due to aluminum steering box issues] ADDITIONAL INFORMATION: Factory High Pressure Line to Pump Bolt Size: M8x1.25x22