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I received the new intake lids today and after installing them and taking the car for test drive, the LTFTs were ~ -23 and ~ -12 for bank 2 and bank 1, respectively, at idle. With the filters installed they were -25 (sensor max) and ~ -20.
When the car cooled off, I put the stock mufflers back on with no change in the fuel trim but there is always a 10 -12 % difference between banks at all revs so I will take it in and have the dealer find out why there is such a large discrepancy between banks.
When I get the car back I will park it as is for the winter and probably swap the tail pipes but leave the stock intake in place, unless the dealer find something else.
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