Below is a general manufacturer product group description. Please note the information below is not item specific. Item specifics are above in product details.

K&N Performance Gold Oil Filters were originally developed for demanding auto race applications, our premium automotive oil filter is rapidly becoming a favorite among consumers for its durability and easy removal. Each K&N Performance Gold Oil Filter comes with a 1” nut welded to the top of the canister so they can be easily wrenched-off with a standard tool.
K&N Performance Gold Oil Filters use resin impregnated cellulose filter media. This allows for higher flow rates while providing outstanding filtration. High filter flow rates are important in racing vehicles where heavier grade oil is used and the oil is pumped much faster than in a standard vehicle. When the engine is circulating oil at high GPM rates, the high-flow oil filter helps reduce the loss of pressure through the filtering process.
FEATURES

Drilled safety wire holes for racing in canister oil filters
Sturdy 1” (automotive) or 17 mm (motorcycle) wrench nut, where applicable, makes oil filter removal quick and easy
Heavy-duty construction
Resin-impregnated filter media provides maximum filtering surface for contaminant removal
Anti-drainback valve (where applicable) eliminates dry starts, prevents oil from draining back into crankcase during engine shutdown
Internally lubricated gasket provides positive seal while allowing easy on and off of filter
Rolled threads provide extra protection against stripping