Ok guys I got a appointment to install the down pipes quicker than I expected at Stein Automotive next Tuesday. I am also going to have them install new NGK plugs that are two heat ranges colder and gap the plugs to .022. I bought the plugs myself online as every installer I got a quote from wanted a ridiculous price for them. The BMW dealer here wanted $45.20 each for these iridium plugs and I got them from Burger for $12.00 each.
Wish we had a 4 wheel dyno nearby to do some testing but I will use the drag strip as a alternative this spring.
Update: the install date got pushed out another week.