Are 02 simulators needed on a long tube install? I am going with non emissions Jet Hots and an off road Y pipe. I plan on getting mail order tuning...so do you still need em or will the tuning eliminate the need for 02 simms?

Also should i get Oxygen sensor extensions for the first two oxygen sensors?
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u'll need 2 oxygen sensor extensions for your front o2s (you cant put a sim on the front ones) for the back ones they can get disabled with the mail in order... so u wont need it but u do need o2 extensions, and i highly recommend a pair for front o2s from acdelco, just change them while down there...

 

ok thanks........what size extensions should i go with? the longer ones or the shorter? And where is a good place to pick up the AC Delco brand Oxygen sensors?
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