Thx, Marty.
Exhaust collectors, 5 to 1. Sure you can buy them, for me buying them from US and shipping here, after all the cost (shipping & taxes) they cost 1200€ (almost $1500/each) For that money I could just buy billet ones from Elmer Racing Shop here in Finland. They make worlds best billet collectors.
(elmerracing.com) non pay'd add.
so, you guested right, I gonna make my own:
First little calculations, as every good project starts with. Stainless steel, Slip fit 2" primaries,with 30 degree bends and 3.5" collectors
(We Finns have a saying that every project that has been properly planned thought is just starting away from been finish.) Well begun is half done
Then tested my calculations with cardboard (CAD=Cardboard Aided Design). Will the cutting ends meet at the middle and will the diameter fit for v-band.
Then designed cutting tool for my band saw, 3d printed from normal PLA-plastic. Also printed an clocking tool, how much I need to turn the pipe between cuts.
After all where cut, run them with polishing wheel, just make them look little nicer, specially at inner sides, I can polish them good on outside after welding. Not so much from the inside, center of the collector.
Then took 10mm - 3/8" steel plate and cut pieces of 2" exhaust tubing, mig welded them to calculated positions to use as welding fixture. Holes at the plate are for inside purge Argon gas. Tig welded them together, Added the v-band, off the fixture.
As you can see at the alst picture, they did deform on me doing the welding, they gather together little bit but I can live with that. Every primeries will have a press formed sleeve over it at the joint to collector, that way my lambda sensors don't get any fresh air between primeries and collectors.
What am I building next...
