K/N Wrench-Off oil filters are engineered to help ensure high flow rates and exceptional protection from contaminants. Each filter comes with a hex nut welded to the top of the canister; allowing for easy removal with a standard wrench.

K&N premium oil filters are meticulously engineered to offer outstanding filtration and engine protection. Designed to operate with all synthetic, conventional, and blended motor oils, K&N's pleated synthetic-blend filtration media helps to shield your engine from contaminants and ensure a consistent flow of oil. The heavy-duty canister is engineered to be exceptionally durable, and a one-inch welded hex nut can be used for quick and easy filter removal. Each filter is specifically designed to withstand the service intervals recommended by vehicle manufacturers, and is protected by the K&N 1-Year Limited Warranty.

• OE Replacement Oil Filter
• 1 in. Exposed Nut Designed For Easy Oil Filter Removal
• Heavy Duty Construction For Extreme Conditions
• Anti-Drain Back Valve - Where Applicable - Eliminates Dry Starts

Anti-Drain Back Valve:	Yes
Bypass Valve:	Yes
Filter Material:	High Flow Premium Media
Gasket Material:	Viton Rubber
Item Height:	5.094 in. (129mm)
Item Weight:	1.200 lbs. (0.5 kg)
Outside Diameter:	3.000 in. (76mm)
Package Material:	Paperboard
Package Type:	Box
Product Box Height:	5.630 in. (143mm)
Product Box Length:	3.150 in. (80mm)
Product Box Width:	3.150 in. (80 mm)
PSI Relief Valve:	11-17
Removal Nut:	Yes
Removal Nut Size:	1.000 in.
Style:	Canister
Thread Size:	M20 x 1.500 in.
Title:	K& N HP-4001 Oil Filter
WARNING CA Proposition 65:	No

• Mobil 1: M1401
• ACDelco: PF2055
• Mann-Filter: W724
• FRAM: PH6941
• Generac: 99021
• Porsche: 25014566
• Purolator: L30165
• Wix: 51287
• Purolator: L27642
• Mann-Filter: W71922

• 1983-1991 Porsche 944        Note: H-5.094 in.; OD-3.0 in.; M20x1.5 Thread; psi Relief Valve 11-17
• 1987-1988 Porsche 924        Note: H-5.094 in.; OD-3.0 in.; M20x1.5 Thread; psi Relief Valve 11-17
• 1991-1992 Porsche 911        Note: H-5.094 in.; OD-3.0 in.; M20x1.5 Thread; psi Relief Valve 11-17
• 1994 Porsche 911        Note: H-5.094 in.; OD-3.0 in.; M20x1.5 Thread; psi Relief Valve 11-17
• 1992-1995 Porsche 968        Note: H-5.094 in.; OD-3.0 in.; M20x1.5 Thread; psi Relief Valve 11-17