Am considering a thundermax ECM # 309-340 ...It fits 02 to 07, I have a 07 flhr..IM currently running a PC III with SE air & supertrapp 2 into 1 exhaust.. the 02 sensors are disconnected and I plugged the bungs in the exhaust pipes..Theres a lot of chatter on these forums its not the ideal set up to run a piggy back tuner.... I see you can get a thundermax used at a reasonable price here and there so I thought Id try one....The "Auto tune" is currently out of my price range...It looks like the TM 309-340 does not use 02s, so my question is do you kinda install the TM and map it like a PCIII without the 02s, or do you have to buy/or should you buy and install wide band 02s...????? and if so do are the wide band 02s same thread size as stock 02s ?????