saw a post about it but also and the matra V12 it has the same configuration where its a pair of cyls with triple out, 1 and 6 were paired, 2 and 5, and finally 3 and 4, i did the math for the exhaust opening events, it adds up but is there really any gain from doing this over running the normal 6 into 2 into 1 or 6 into 1 long tube?