what are these. do i need them?

Do you have a stock bike (exhaust and airfilter)? if yes, you do not need these. May I suggest you read up on MODS here (and not on FB) :)
 
I don't think u really need'em. If u do a search on here you'll find a couple of threads about them. I remember seeing them!
 
i do get some backfiring under decel. but not too bad.

for the price i think i'll just get them. the look cleaner than the OEm stuff anyway.
 
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