Mazdaspeed6 Clutch Fix TSB

wish i could to ANY TSBs... my warranty ran out last month. :(
missed out on clutch, rear diff, driver seat TSBs which i needed all of! argh
 
I have full 3" down pipe will that be a problem for the tsb on the clutch? my car is a 2006 so i think it falls under type A
 
My local dealer just quoted me $3889 to fix this clutch issue out of pocket.
I see other people paid around $1200-1600 for the same fix. Is there an aftermarket fix for this that is cheaper?
 
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