Product Description
Melling M365HV High Volume Oil Pump
Fits 2007-later Gen 4 LS-Based Engines 5.3L 6.0L 6.2L
LH6 LMF LC9 LH9 LS4 L76 L77 L92 L99 L9H L94 LSA
High volume upgrade oil pump for engines originally equipped with an M365 equivalent oil pump (see application chart in pictures and RPO codes listed above). Flows 20% more than the standard GM DOD/AFM oil pump. This pump is a great upgrade for high mileage engines when running a stock camshaft. For higher RPM performance applications, see the 10355HV pump.
Melling high volume oil pumps increase the amount of oil flow by an average of 20% through the engine improving oil pressure at idle providing dependable performance every time in every application. Every Melling high volume oil pump is engineered and assembled to the highest production standards from high quality materials. All Melling high volume oil pumps use the latest in gerotor technology to provide the highest level of quality and performance. High volume gears are machined to close tolerances to ensure proper engine pressure and correct, efficient pump operation. End plates are precision ground for maximum ware resistance. Every Melling oil pump is individually tested for pressure and flow under conditions designed to duplicate actual engine operating conditions.
Includes new pickup tube O-rings and optional bypass pressure springs. For most applications we recommend using the spring that comes already pre-installed in the pump.
Made in the USA!
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M365HV Perfect fit
Originally purchase M365 for my 2012 Sierra 1500 with 249,xxx miles from Michigan and worked great but wanted more idle pressure and volume for my LC9 5.3 so I purchased the M365HV. Came with (orange) 70psi already installed but swapped to the (yellow) -10 spring. Cold start up is at 60psi and hot idle is 35-40psi. Oil 5w-30 with prolube additive. So far pickup is loving it, granted Melling is a great product. Unlike other sites the has similar knockoffs, Michigan Motorsports has the real deal at a great price. Quickly shipped and made it to my front door quickly. Would definitely order again. Thank you.
