1. Kyosho option damper
2. lower suspension graphite plates
3. option damper springs set
4. Kyosho ball diff set
5. Kyosho Ti shaft for F1
6. Alu steering hub
7. ATM F1 tires
8. ATM alu front rigid steering rod holder
9. Kyosho front spring set for 02
10. Kyosho Xspeed ( fet is not required since xspeed with its stock AM PCB or AD PCB already got reasonable speed for CT - Wider track that can accommodate F1 )
11. Suspension plate spring set
12. Kyosho Ti King Pin
The most important reason why the F1 is slower than the others is it is difficult to improve the rear grip without oil dampers or 'cha cha'. If you add the latter, you might have to remove part of the shell which will damage the look. (Unless you can DIY those dampening devices so small that they can hide inside the body shell)