I'm also considering to try the TM Works for my sons SSS. I saw in mudah just under rm600....
You want to improve FC the TM Works thing is going to smoothen out your plug coils and perhaps give a bit of extra torque. But the caveat is if your car is old - then it'll work great to make it "new again". A new car won't feel any difference. If you however increase the voltage output using stuff like the IgniteVSD and Alpha16V it'll probably help a bit with the spark side of things and improve combustion hence improving FC? I dunno. I wanna test this but it's not exactly cheap.
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SSR Type-C if not mistaken is already forged type or at least semi solid forging while RPF1 is still MAT casting type so understandable if RPF1 is heavier. There should be quite a few rims that are even lighter than RPF1 like Racing Hart CP035, Spoon SW388/Regamaster Evo, VR CE28N just to name a few....
I didn't know SSR was so light! That's even lighter than the Enkei RPF1