K&N Powersports Cartridge Oil Filters are designed to satisfy the needs of racers and engine builders as well as the average motorcycle or ATV owner who wants the best oil filter available. K&N Powersports Oil Filters are 'TUV' product endorsed and 'TUV' factory production monitored.
K&N cartridge oil filters trap harmful contaminants while the filter's construction allows for high oil flow rates.

Part KN-157 Product Specifications
Product Style: Oil Filters
Anti Drain Back Valve: No
Bypass Valve: No
Filter Material: High Flow Premium Media
Gasket Material: Nitrile Rubber
Height: 2.063 in (52 mm)
Outside Diameter: 1.625 in (41 mm)
PSI Relief Valve: No
Removal Nut: No
Style: Cartridge
Thread Specification: N/A
Inside Diameter: 0.469 in (12 mm)
Weight: 0.1 lb (0.05 kg)

Cross reference KN-157 Oil Cartridge:
KTM 59038046000
KTM 59038046100
KTM 59038046144
Polaris 2520755

K&N KN-157 fits the following:
2012 KTM 690 SMC 690 - 2nd Filter  
2012 KTM 690 ENDURO R 690 - 2nd Filter  
2012 KTM 690 DUKE 690 - 2nd Filter  
2011 POLARIS OUTLAW 525 IRS 525 - 2nd Filter  
2011 KTM 690 SMC 690 - 2nd Filter  
2011 KTM 690 ENDURO R 690 - 2nd Filter  
2011 KTM 690 DUKE 690 - 2nd Filter  
2010 POLARIS OUTLAW 525 S 510 - 2nd Filter  
2010 KTM 690 SMC 690 - 2nd Filter  
2010 KTM 690 ENDURO R 690 - 2nd Filter  
2010 KTM 690 ENDURO 690 - 2nd Filter  
2010 KTM 690 DUKE 690 - 2nd Filter  
2010 KTM 525 XC ATV 525 - 2nd Filter  
2009 POLARIS OUTLAW 525 S 510 - 2nd Filter  
2009 POLARIS OUTLAW 525 IRS 525 - 2nd Filter  
2009 POLARIS OUTLAW 525 525 - 2nd Filter  
2009 POLARIS OUTLAW 450 MXR 450 - 2nd Filter  
2009 KTM 690 SMC 690 - 2nd Filter  
2009 KTM 690 ENDURO R 690 - 2nd Filter  
2009 KTM 690 ENDURO 690 - 2nd Filter  
2009 KTM 690 DUKE 690 - 2nd Filter  
2009 KTM 525 XC ATV 525 - 2nd Filter  
2009 KTM 450 XC ATV 450 - 2nd Filter  
2009 BETAMOTOR RR ENDURO 4T 525 - 2nd Filter  
2009 BETAMOTOR RR ENDURO 4T 450 - 2nd Filter  
2009 BETAMOTOR RR ENDURO 4T 400 - 2nd Filter  
2008 POLARIS OUTLAW 525 S 510 - 2nd Filter  
2008 POLARIS OUTLAW 525 IRS 525 - 2nd Filter  
2008 POLARIS OUTLAW 525 525 - 2nd Filter  
2008 POLARIS OUTLAW 450 MXR 450 - 2nd Filter  
2008 KTM 690 SUPERMOTO R 690 - 2nd Filter  
2008 KTM 690 SUPERMOTO 690 - 2nd Filter  
2008 KTM 690 SMC 690 - 2nd Filter  
2008 KTM 690 ENDURO 690 - 2nd Filter  
2008 KTM 690 DUKE 690 - 2nd Filter  
2008 KTM 525 XC ATV 525 - 2nd Filter  
2008 KTM 450 XC ATV 450 - 2nd Filter  
2008 KTM 450 XC 450 - 2nd Filter  
2008 BETAMOTOR RR ENDURO 4T 525 - 2nd Filter  
2008 BETAMOTOR RR ENDURO 4T 450 - 2nd Filter  
2008 BETAMOTOR RR ENDURO 4T 400 - 2nd Filter  
2008 BETAMOTOR RR ENDURO 4T 250 - 2nd Filter  
2007 POLARIS OUTLAW 525 IRS 525 - 2nd Filter  
2007 KTM 690 SUPERMOTO R 690 - 2nd Filter  
2007 KTM 660 RALLYE FACTORY REPLICA 660 - 1st Filter  
2007 KTM 560 SMR 560 - 2nd Filter  
2007 KTM 525 XC-W 525 - 2nd Filter  
2007 KTM 525 XC DESERT RACING 525 - 2nd Filter  
2007 KTM 525 XC 525 - 2nd Filter  
2007 KTM 525 SX RACING 525 - 2nd Filter  
2007 KTM 525 MXC RACING 525 - 2nd Filter  
2007 KTM 525 EXC RACING 525 - 2nd Filter  
2007 KTM 525 EXC 525 - 2nd Filter  
2007 KTM 450 XC-W 450 - 2nd Filter  
2007 KTM 450 XC 450 - 2nd Filter  
2007 KTM 450 SMR 449 - 2nd Filter  
2007 KTM 450 EXC RACING 450 - 2nd Filter  
2007 KTM 450 EXC 450 - 2nd Filter  
2007 KTM 400 XC-W 400 - 2nd Filter  
2007 KTM 400 EXC RACING 400 - 2nd Filter  
2007 BETAMOTOR RR ENDURO 4T 525 - 2nd Filter  
2007 BETAMOTOR RR ENDURO 4T 450 - 2nd Filter  
2007 BETAMOTOR RR ENDURO 4T 400 - 2nd Filter  
2007 BETAMOTOR RR ENDURO 4T 250 - 2nd Filter  
2006 KTM 560 SMR 560 - 2nd Filter  
2006 KTM 540 SXS 540 - 2nd Filter  
2006 KTM 525 XC-W 525 - 2nd Filter  
2006 KTM 525 XC-G RACING 525 - 2nd Filter  
2006 KTM 525 XC 525 - 2nd Filter  
2006 KTM 525 SX RACING 525 - 2nd Filter  
2006 KTM 525 SX 525 - 2nd Filter  
2006 KTM 525 SMR 525 - 2nd Filter  
2006 KTM 525 MXC RACING 525 - 2nd Filter  
2006 KTM 525 EXC-G RACING 525 - 2nd Filter  
2006 KTM 525 EXC RACING 525 - 2nd Filter  
2006 KTM 450 XC-G RACING 450 - 2nd Filter  
2006 KTM 450 SXS 450 - 2nd Filter  
2006 KTM 450 SX RACING 450 - 2nd Filter  
2006 KTM 450 SX 450 - 2nd Filter  
2006 KTM 450 SMR 449 - 2nd Filter  
2006 KTM 450 MXC RACING 450 - 2nd Filter  
2006 KTM 450 EXC-G RACING 450 - 2nd Filter  
2006 KTM 450 EXC RACING 450 - 2nd Filter  
2006 KTM 400 EXC-G RACING 400 - 2nd Filter  
2006 KTM 400 EXC RACING 400 - 2nd Filter  
2006 KTM 250 EXC RACING 250 - 2nd Filter  
2006 BETAMOTOR RR ENDURO 4T 525 - 2nd Filter  
2006 BETAMOTOR RR ENDURO 4T 450 - 2nd Filter  
2006 BETAMOTOR RR ENDURO 4T 400 - 2nd Filter  
2006 BETAMOTOR RR ENDURO 4T 250 - 2nd Filter  
2005 KTM 660 SMC 660 - 2nd Filter  
2005 KTM 625 SXC 625 - 2nd Filter  
2005 KTM 540 SXS RACING 540 - 2nd Filter  
2005 KTM 525 XC-W 525 - 2nd Filter  
2005 KTM 525 XC 525 - 2nd Filter  
2005 KTM 525 SX SUPERMOTO 525 - 2nd Filter  
2005 KTM 525 SX RACING 525 - 2nd Filter  
2005 KTM 525 SMR 525 - 2nd Filter  
2005 KTM 525 MXC-G RACING 525 - 2nd Filter  
2005 KTM 525 MXC RACING 525 - 2nd Filter  
2005 KTM 525 MXC DESERT RACING 525 - 2nd Filter  
2005 KTM 525 EXC-G RACING 525 - 2nd Filter  
2005 KTM 525 EXC RACING 525 - 2nd Filter  
2005 KTM 450 SXS RACING 450 - 2nd Filter  
2005 KTM 450 SX RACING 450 - 2nd Filter  
2005 KTM 450 SMR 449 - 2nd Filter  
2005 KTM 450 MXC RACING 450 - 2nd Filter  
2005 KTM 450 EXC-G RACING 450 - 2nd Filter  
2005 KTM 450 EXC RACING 450 - 2nd Filter  
2005 KTM 400 EXC-G RACING 400 - 2nd Filter  
2005 KTM 400 EXC RACING 400 - 2nd Filter  
2005 KTM 250 EXC-G RACING 250 - 2nd Filter  
2005 KTM 250 EXC RACING 250 - 2nd Filter  
2005 BETAMOTOR RR ENDURO 4T 525 - 2nd Filter  
2005 BETAMOTOR RR ENDURO 4T 450 - 2nd Filter  
2005 BETAMOTOR RR ENDURO 4T 400 - 2nd Filter  
2005 BETAMOTOR RR ENDURO 4T 250 - 2nd Filter  
2004 KTM 660 SMC 660 - 2nd Filter  
2004 KTM 625 SXC 625 - 2nd Filter  
2004 KTM 540 SXS RACING 539 - 2nd Filter  
2004 KTM 525 XC-W 525 - 2nd Filter  
2004 KTM 525 XC 525 - 2nd Filter  
2004 KTM 525 SX SUPERMOTO 525 - 2nd Filter  
2004 KTM 525 SX RACING 525 - 2nd Filter  
2004 KTM 525 SMR 525 - 2nd Filter  
2004 KTM 525 MXC-G RACING 525 - 2nd Filter  
2004 KTM 525 MXC RACING 525 - 2nd Filter  
2004 KTM 525 MXC DESERT RACING 525 - 2nd Filter  
2004 KTM 525 EXC-G RACING 525 - 2nd Filter  
2004 KTM 525 EXC RACING 525 - 2nd Filter  
2004 KTM 450 XC CROSS COUNTRY 450 - 2nd Filter  
2004 KTM 450 SXS RACING 450 - 2nd Filter  
2004 KTM 450 SX RACING 450 - 2nd Filter  
2004 KTM 450 SMS 450 - 2nd Filter  
2004 KTM 450 SMR 450 - 2nd Filter  
2004 KTM 450 MXC-G RACING 450 - 2nd Filter  
2004 KTM 450 MXC RACING 450 - 2nd Filter  
2004 KTM 450 EXC-G RACING 450 - 2nd Filter  
2004 KTM 450 EXC RACING 450 - 2nd Filter  
2004 KTM 400 EXC-G RACING 400 - 2nd Filter  
2004 KTM 400 EXC RACING 400 - 2nd Filter  
2004 KTM 250 EXC-G RACING 250 - 2nd Filter  
2004 KTM 250 EXC RACING 250 - 2nd Filter  
2003 KTM 660 SUPERMOTO FACTORY REPLICA 660 - 2nd Filter  
2003 KTM 660 SMC 660 - 2nd Filter  
2003 KTM 625 SXC 625 - 2nd Filter  
2003 KTM 540 SXS RACING 539 - 2nd Filter  
2003 KTM 525 XC-W 525 - 2nd Filter  
2003 KTM 525 XC 525 - 2nd Filter  
2003 KTM 525 SX RACING 525 - 2nd Filter  
2003 KTM 525 MXC-G RACING 525 - 2nd Filter  
2003 KTM 525 MXC RACING 525 - 2nd Filter  
2003 KTM 525 MXC DESERT RACING 525 - 2nd Filter  
2003 KTM 525 EXC-G RACING 525 - 2nd Filter  
2003 KTM 525 EXC RACING 525 - 2nd Filter  
2003 KTM 450 SXS RACING 450 - 2nd Filter  
2003 KTM 450 SX RACING 450 - 2nd Filter  
2003 KTM 450 MXC-G RACING 450 - 2nd Filter  
2003 KTM 450 MXC RACING 450 - 2nd Filter  
2003 KTM 450 EXC-G RACING 450 - 2nd Filter  
2003 KTM 450 EXC RACING 450 - 2nd Filter  
2003 KTM 250 EXC-G RACING 250 - 2nd Filter  
2003 KTM 250 EXC RACING 250 - 2nd Filter  
2002 KTM 660 SUPERMOTO FACTORY REPLICA 660 - 2nd Filter  
2002 KTM 625 SXC 625 - 2nd Filter  
2002 KTM 625 SC SUPERMOTO 625 - 2nd Filter  
2002 KTM 625 SC 625 - 2nd Filter  
2002 KTM 540 SXS RACING 539 - 2nd Filter  
2002 KTM 520 SX RACING 510 - 2nd Filter  
2002 KTM 520 MXC RACING 510 - 2nd Filter  
2002 KTM 520 EXC-G RACING 510 - 2nd Filter  
2002 KTM 520 EXC RACING 510 - 2nd Filter  
2002 KTM 400 SX RACING 400 - 2nd Filter  
2002 KTM 400 MXC RACING 400 - 2nd Filter  
2002 KTM 400 EXC-G RACING 400 - 2nd Filter  
2002 KTM 400 EXC RACING 400 - 2nd Filter  
2002 KTM 250 EXC RACING 250 - 2nd Filter  
2001 KTM 540 SXS RACING 539 - 2nd Filter  
2001 KTM 520 SX RACING 510 - 2nd Filter  
2001 KTM 520 MXC RACING 510 - 2nd Filter  
2001 KTM 520 EXC RACING 510 - 2nd Filter  
2001 KTM 400 SX RACING 400 - 2nd Filter  
2001 KTM 400 MXC RACING 400 - 2nd Filter  
2001 KTM 400 EXC RACING 400 - 2nd Filter  
2001 KTM 250 EXC RACING 250 - 2nd Filter  
2000 KTM 520 SX RACING 520 - 2nd Filter  
2000 KTM 520 MXC RACING 520 - 2nd Filter  
2000 KTM 520 EXC RACING 510 - 2nd Filter  
2000 KTM 400 SX RACING 400 - 2nd Filter  
2000 KTM 400 MXC RACING 400 - 2nd Filter  
2000 KTM 400 EXC RACING 400 - 2nd Filter  
1999 KTM 520 SX RACING 520 - 2nd Filter  
1999 KTM 520 MXC RACING 520 - 2nd Filter  
1999 KTM 520 EXC-E 510 - 2nd Filter  
1999 KTM 520 EXC RACING 520 - 2nd Filter  
1999 KTM 400 SX RACING 400 - 2nd Filter  
1999 KTM 400 MXC RACING 400 - 2nd Filter  
1999 KTM 400 EXC-E RACING 400 - 2nd Filter  
1999 KTM 400 EXC RACING 400 - 2nd Filter  
1999 KTM 400 EXC 400 - 2nd Filter