I think you are forgetting where the N54 is headed these days. The ownership group of these cars is getting cheaper, and cheaper. I mean shit we posted a breather on here for under $200, and the first thing that happened was for people to bitch about price. You should have made your manifold two years ago when the market was open. Now you have to compete with all this stuff on the market. Is there any question you manifold is light years ahead of this in quality, and design? Absolutely not, problem is, the average buyer will be running 500-600WHP, and the gains between the two will be marginal at best. Shit I would be surprised if either showed gains over a stock manifold at those levels. So for no difference in power for 90% of the buyers, its $700, or $2500. Its obvious who will get most of the sales, hopefully you didn't spend too much designing, and building your manifolds.
I'm well aware of that, and I have no doubt I'll sell my manifolds. People have complained about prices since I got in this industry over 10 years ago, hasn't stopped me or slowed me up yet!