K&N powersports oil filters contain a modern synthetic filter media, designed for ultimate flow with less pressure drop, yet engineered for outstanding filtration. K&N powersports 'spin-on' oil filters feature a heavy-duty metal can. Most of these have a 17 mm nut affixed onto the end that allows for easy installation and removal. The 17 mm nut is crossed-drilled so racers can safety wire the filter to their bike. 
Product Specifications

 Anti Drain Back Valve:YesBypass Valve:YesFilter Material:High Flow Premium MediaGasket Material:Nitrile RubberHeight:3.438 in (87 mm)Outside Diameter:2.688 in (68 mm)Part Number:KN-156Product Box Height:3.63 in (92 mm)Product Box Length:2.81 in (71 mm)Product Box Width:2.81 in (71 mm)Product Style:Oil FiltersPSI Relief Valve:YesRemoval Nut Size:17 mmRemoval Nut:YesStyle:CanisterThread Specification:M20 x 1.5Weight:0.57 lb (0.26 kg)

Manufacturer's Part Number	KN-156
CARB Approved	Yes