I can measure tonight. This is reportedly the "small bore" RDZ raw finish pipe without the factory flange (I believe I very closely replicated it though) so take my measurement for what it's worth.
I had thought originally about simply buying one (retail price, that is) but decided to make my own pipe. I'm kind of glad I did, I learned A LOT about pipe building in general but also about how the pipe parameters affect the engine output in the process.
On a side note, the RDZ is sort of the "bargain" pipe and I kinda see why. It's not bad but the seams up each side are welded external which leaves a pretty rough line up the side (despite being stamped) and the stingers are known to simply break off at random intervals (even during races
). Also, the mounting bracket and welding on that bracket are pretty crude. Not bad at all for the money ($265 new?) but also not the finest I've ever seen either.
