Im getting ready to tune SDVE. Im noticing bank 1 is typically abour 4% leaner than bank 2. Both float between -5% and +5%. I can find no noticible leaks in either exhaust system. I can not see any track of black at the joints nor can I feel any leaks. I have SLP long tube headers. So O2 sensors are farther away than stock positions but are basically the same distance from teh heads for each bank. Whats and acceptable difference in LTFTs between banks?