Mate. I bought a new DC5 from the honda place. Did the mods you listed except the suspension, cause I forgot. I also bought some 2nd hand rims, but I don't think they affect anything other than visual??
R3 I assume you mean racing medium, which I used.
Checked again:
Race Exhaust
Na Tune Stage 1
Performance Chip
R3 Tyres (medium race)
Tripple Plate Clutch
Race Flywheel
That is the only mods I added. As said, forgot suspension.
Oh, also mine says 264hp in garage.
Happy to take on any challenges, I just play it too much.