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THIS MODIFIED HIGH PRESSURE OIL VALVE IS FOR 1989-1992 and (GSX-R1100W FOR OIL PAN ONLY) GSXR1100 OIL PAN, AND WILL INCREASE YOUR OIL PRESSURE BY ABOUT 30%, PROVIDING MORE OIL PRESSURE TO YOUR ROD & MAIN BEARINGS, CAMS & ROCKER ARMS, AND OIL COOLER. IT ALSO PASSES MORE OIL THROUGH YOUR OIL FILTER FOR A CLEANER RUNNING MOTOR. I HAVE BEEN MAKING THESE VALVES FOR 24 YEARS AND THEY WORK GREAT ! CHECK OUT MY OTHER LISTINGS, I ALSO MODIFY A HIGH PRESSURE OIL VALVE FOR THE OIL PUMP, FOR ANOTHER 30% INCREASE IN OIL PRESSURE. I USE ONE ON OIL PUMP FOR STREET USE AND A SECOND VALVE IN THE OIL PAN FOR RACING. IF YOU USE TWO VALVES IN THE MOTOR WITH 10-30 MOTOR OIL, IT SHOULD IDLE AT ABOUT 120 PSI OF OIL PRESSURE, IT MAY VARY DEPENDING ON THE CONDITION OF YOUR OIL PUMP, AND WITH TWO OIL VALVES YOU MUST WARM UP THE MOTOR TO OPERATING TEMPERATURE ONCE IN THE MORNING, AND THEN YOUR GOOD FOR THE WHOLE DAY. ALL THE MOTORS WE BUILT THAT WE USED THESE VALVES IN, NEVER SPUN A ROD BEARING OR HAD ANY OTHER OIL RELATED PROBLEMS !! THE LAST PIC IS VALVE INSTALLED INTO OIL PAN, OIL PAN NOT FOR SALE AND THE BIKES ARE NOT FOR SALE. PLEASE BUY WITH CONFIDENCE. VERY EASY TO INSTALL, JUST REMOVE YOUR OLD VALVE AND PUT OUR HIGH PRESSURE VALVE IN AND YOUR DONE. CHECK MY OTHER LISTING IF YOU WANT TO BUY TWO VALVES. STOCK MOTOR OR RACE MOTOR, THESE HIGH PRESSURE OIL VALVES SAVE YOUR MOTOR ! IT'S YOUR CHOICE, YOU COULD LET YOUR ROD BEARINGS RIDE ON THE CRANKSHAFT, OR RIDE ON OIL. THANK YOU. I WILL BUY YOUR OLD OIL PRESSURES VALVES IF YOU WOULD MAIL THEM BACK.