DJ Safety Engine Diapers - Good Vibrations DJ Safety engine diapers are available in bullet proof carbon fiber, lightweight K evlar and Ballistic Nylon. Quick disconnect straps are included along with re-usable, snap-in absorbent pads. DJ's engine diaper are the finest on the market! Safety Recerts based on NHRA's Rules Engine Diaper for Pro 7.1 - 1 year Engine Diaper for Sportsman 7.2 - 5 years engine diaper | JEGS Mustang & Ford Racing. Ford Racing; Mustang + View All Mustang & Ford Racing Categories. Oil System. Oil System. 5-Gallon Jugs and Funnels; Crankcase Evacuation System; Fittings; Engine Diaper; NHRA accepted ; Fits 6 to 10 quart oil pans with internal/wet sump oil system; Perfect for Sportsman Classes; not SFI approved; View Details.