I have a single turbo kit and I'm just wondering if it's necessary to have the dual 02 sensors or if I can just go with 1 to make them easier to install? Is it a real PITA to get to the exhaust manifolds to weld in the bungs? I was initially going to just get 1, but was informed that 2 is still the way to go.. Thanks for your help guys.

 

on our vehicle there are 2 primary and 2 secondary sensors. obviously you need both primaries (separate banks) but after the exhaust merges you could have the secondaries as 1 and clone the signal, but it is not recommended. Really won't make much difference.