Do I need to put the little screw on caps on these plugs for the nytro? the set I'm replacing didn't have them on. On my apex we had to have these on. 
Thanks
Thanks
theCATman
TY 4 Stroke Master
If the ones you took out didn't, then no. It depends on what type of plug cap is on the ignition wires as to whether or not the caps are used on the plugs.
4bangpower
Extreme
Terminal caps are not needed for the CR10EK spark plugs on the Nytro application. However, as you stated, Apex/Attak/LTX....the terminal cap is needed.
