For the 1994 season, two new engines were introduced. The 265-D engine replaced the 265-C, although some of the smaller teams still ran the "C" throughout 1994. Without badging support, the engines were referred to simply as the "Ilmor-C" and the "Ilmor-D". The other engine introduced in 1994 was the top-secret 265-E (see below), which was actually a 3.43 liter pushrod engine, used by Penske Racing at the 1994 Indianapolis 500.