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use the dual spring with high pressure locators available here
Gasket (1)
We enjoy bringing smoothness
with the expansion and the perfection of the exhaust note
Weldon Racing A2047 Series Bypass Regulator - A2047-438-T-120 FS Moto Please check with your localWeldon Racing A2047 Fuel Pressure Regulator ( FPR ) All Weldon Regulators maintain steady fuel delivery during dramatic changes in fuel demand, such as WOT conditions, boost application and gear changes with precision pressure control . 438" bypass orifice Teflon diaphragm with o ring seal ensures leak free operation Flows over 12 GPM 1 8" NPT Gauge Port 1 8" NPT manifold pressure reference port Adjustable between 28 120 PSI 12 pressure and return