Power is back on, lets buy some parts

[Power Adder]

Yes, I was looking into the big bores but what kind should look into Overall im tring to sheld some uneeded weight. If the 8.5 is only 4mm longer. Ill keep the stock chassi. Any race upgrades like Carbon fiber or Alloy parts. My chassi has held up pretty good I think my 8.0 is a pro but how can I truly tell.