there's nothing "wrong" with the stock ones, the blue a, b, c & d plates are just stronger and allow for more tune-ability. becareful tho the blue is like a drug, and before ya know it you double the price of your ride just in blue upgrades.

wow, those are back in stock... mmm.. yummy blue aluminum
and no THOSE particular ones aren't included in the kit.

keep an eye out on ebay for the championship upgrades, the dismantlers spit out parts pretty regularly.