The LC-2 is the way to go for temporary mounting. Way to easy. The tailpipe extension is another time saver but seems to be only very accurate at WOT runs. Can get some air during cruise situations. That is what it is designed for on a dyno. So if you can do all your tuning via NB and only need the WB for the WOT then it's perfect. But still the exhaust shop only charges me $35 to install a separate bung when I need them. I have an LC-1 mounted in my truck and really no need for it anymore and it's a lot of work to remove and re-install.

I'd like to sell/trade my LC-1 for a LC-2...