Generator Tune Up Filter Kit, HGJAB HGJAD Parts air filters are designed with a special foam pre-cleaner, for use specially in Onan RV generators. Other manufacturer's air filters may contain a lighter density filter paper and the sealing surfaces may get brittle and crack over time, allowing dirty air into the engine intake system. Onan 140-3116 Generator Air Filter; Fits Generator Models for Emerald Advantage HGJAC Gasoline And LP vapor/ Marquis Gold Gasoline And LP vapor/ Marquis HGJAA EFI And LP Vapor; With Foam Pre-Cleaner Compatibility: Generator Models for Emerald Advantage HGJAC Gasoline And LP vapor/ Marquis Gold Gasoline For Onan 122-0836 Generator Oil Filter; Fits Generator Models for Emerald Advantage Gasoline/HGJAC And LP Vapor/HGJAC/ Marquis Gold Gasoline/HGJAB And LP/HGJAB/ Marquis EFI/HGJAA And LP/HGJAA; Without Anti Drain Back Valve; With Bypass Valve; Canister Style Compatibility: Generator Models for Emerald Advantage Gasoline/ HGJAC And LP Vapor/ HGJAC/ Marquis Gold Gasoline With Anti-Drain Back Valve: No With Filter Bypass Valve: Yes Features Valves That Allow Oil To Bypass The Oil Filter During Cold Starts Or If The Filter Becomes Plugged Specified Levels Of Durability, Reliability And Performance Precision Design, State-Of-The-Art Manufacturing Tested And Designed Specifically For RV Applications Color: Black & White & Blue Material: Filter Paper + Metal Package Contents: 1x Air filter 1x Oil filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.