Hiflofiltro air filters are manufactured to fit the factory air box and are a direct replacement for original equipment filters.
Fits:
Kawasaki ER-5 Twister (35ps) & (50ps) 1999,
Kawasaki ER500 A1-A4,B1-B4 (ER-5) 1996 to 2000,
Kawasaki ER500 C1,D1 (ER-5) 2001 to 2002,
Kawasaki ER500 C3,C4P,C5P (ER-5) 2003 to 2006