PM billet aluminum cam covers for 2001-2017 Twin Cam can also be fitted to 1999-2000 Twin Cam with an aftermarket ignition that does not use the stock cam position sensor. They do not fit S&S T-Series engines nor other engines equipped with the S&S cam gear oil pump system. Black Ops is PM's proprietary two-tone black that combines textured and gloss black that matches perfectly with the black wrinkle on engines and transmissions.