hi guys, yeah like most things today you need to modify to suit the requirements. I am going to make some stainless Siamese pipes at some time, with SS pipes and fittings available to day it shouldn't be that difficult, cut and tack all the bits then get a welder to tig it all up/file and polish. i know it sounds easy but can be done. Many years ago i did the same with mild steel fittings to make headers for the 57 ford V.8 customline that i had, of course mild steel was easier to weld up so could do it myself using oxy/acet a good wee project, cheers