Here is a list of weight differences
Parts Standard kit parts carbon reinf.parts
Front damper stay (J2) 7,7gr
6,2gr
Rear damper stay (J1) 9,0gr
6,9gr
Front lower bulkhead (A4&A5) 7,7gr
6,7gr
Rear lower bulkheads (A2&A3) 5,3gr
4,6gr
Rear upper brace (A9&A10) 7,2gr
6,4gr
Front upper bulkhead (A8) 6,6gr
5,7gr
Rear upper bulkhead (A11) 7,7gr
6,7gr
Front damper mount (A1) 2,4gr
2,0gr
Front damper brace (A6&A7) 10,8gr
9,4gr
Differential gear housing (T1&T2) 22,0gr
20,0gr
Chassis 99,0
102,0gr
Hope this helps
There are still other parts then can be replaced with original tamiya parts for even more weight saving
