Here are the part numbers to convert your standard RB5 to SP specs. If you are already running the "worlds conversion" there will be some pieces you wont necessarily need to change like the arms (although now you can get a front arm and rear mid-arm together now), rear hubs, and velvet shock bodies.
How to make your RB5 into a RB5-SP
- 1. LA218 Front and Rear Wheel Hex’s (4pcs) x 1
2. LA247 Complete Downforce Wing Set (3pcs) x 1
3. LAW39 Steel Suspension Bushings (8pcs) x 1
4. UM505B Front Knuckle & Hub Carrier Set x 1
5. UM508B Gear Box Set x 1
6. UM519 Rear Hub Type-B x 1
7. UM520 Carbon Composite Short Rear Tower x 1
8. UM521 Front and Rear RB5 Arm Set x 2
9. UM522-02 New Rear Wheel Shaft x 1
10. UMB02 Sword Body x 1
11. W5181-55 Orange Front Springs x 1
12. W5183-04 Silver Rear Springs x 1
13. W5185-01V Front Velvet Coated Shock Body x 2
14. W5196-01V Rear Velvet Coated Shock Body x 2
15. W5202W New White Rear Wheel (2pcs) x 1
16. W5202Y New Yellow Rear Wheel (2pcs) x 1
17. 96643 x 1 5x7 Shim Set (10pcs) x 1
18. 97008-40H New SP Ti-Rods (2pcs) x 3
19. 97021H New SP Ball Cups (12pcs) x 1
The UM508B gear box set comes with two sets of rear suspension holders...one is the same as the one that is in use now and the other is wider. The wider one has not been used out here in the US...it doesnt seem to be working well for our style of tracks but it could be something to try out on your side of the pond.