Factory Spec severe duty brake pads are made of a sintered bronze compound. Their exclusive high-density mix extends pad life for use in extreme conditions such as sand, mud, water and farm usage. If long life is your main concern, these brake pads are your best choice. They will last much longer than any semi-metallic or organic brake pad on the market. Manufactured by Factory Spec Included is two sets of brake pads, as pictured This is enough to replace the pads on the front calipers Made in China These sintered metal brake pads fit the following models 1998 Arctic Cat 400 2x4 Utility Arctic Cat 400 4x4 Utility 1999 Arctic Cat 400 2x4 Utility Arctic Cat 400 4x4 Utility 2000 Arctic Cat 400 2x4 Utility Arctic Cat 400 4x4 Utility 2001 Arctic Cat 400 2x4 Utility Arctic Cat 400 4x4 Utility 2002 Arctic Cat 400 2x4 Manual FIS Arctic Cat 400 4x4 Manual FIS 2003 Arctic Cat 400 2x4 Auto FIS Arctic Cat 400 2x4 Manual FIS Arctic Cat 400 4x4 Auto Arctic Cat 400 4x4 Auto FIS Arctic Cat 400 4x4 Auto FIS MRP Arctic Cat 400 4x4 Manual Arctic Cat 400 4x4 Manual FIS Arctic Cat 400 4x4 Manual FIS MRP 2004 Arctic Cat 400 2x4 Auto FIS Arctic Cat 400 2x4 Manual FIS Arctic Cat 400 4x4 Auto FIS Arctic Cat 400 4x4 Auto FIS MRP Arctic Cat 400 4x4 Auto TBX Arctic Cat 400 4x4 Manual FIS Arctic Cat 400 4x4 Manual FIS MRP 2005 Arctic Cat 400 4x4 Auto VP Arctic Cat 400 4x4 Manual VP