Any info on RetroTech performance tunnel ram?

I came across a retroteck sheet metal tunnel ram and I have never heard of them. I was hoping someone could give me some feedback there intakes. I tried looking them up but found no info at all on them. The one I found is a standard port window witha duel 4150 top

Thanks

I'm sure that is a fabricated tunnel ram, correct? If so I bought a used one several years back for a RB with M.W. ports, it is on a motor now and it worked great on the dyno and at the track I couldn't find any info on them back then either

Yes it is a fabricated tunnel ram. Im looking to use it on a 470 lowdeck with a set of stage vi heads. The only info i have found on them is older post by Cab about using one

Mike at Muscle Motors may be able to provide some info. I know he used some of their intakes in the past.