I only posted the info so you might have something to compare with others.
1997 C5 M6
The intake and price can be found at
http://www.breathlessperformance.com
C5 Vortex Ram Induction Clear Box. (I got the black one)
Flow masters are fairly standard. A good shop can order them for about the same cost as you can find on the net, I had mine done at West Coast mufflers in Concord CA.
I can’t remember the cost. (I’ll look it up and get back to you). Basically it’s the price of the kit and about $100.00 to install.
I installed the intake kit myself, it’s not hard to do if you have basic mechanical skills and tools. 3 or 4 hours included getting it up on/off the jack stands. I have a write up and a few pictures from when I did mine. If you’d like to take a look let me know and I’ll shoot you off a copy.
I had both modifications done at different times. After the Flowmasters, it of course “Felt” quicker but that was probably just the optimistic feeling that came with the new sound. It does sound a lot more like a Corvette.
After the intake, it was quicker. Track times went from 13.4’s to .8’s to 13.0’s - .4’s. Some of this may have been my getting more comfortable with the car, but not all of it.
It was running low 13’s and trapping around 110mph when I finally put it on the Dyno.