How Steel donuts are made?
Hey guys, i would like to know the process used to fabricate steel donuts, like the ones used to make custom exhaust manifolds, and such.
Are they made from two U mandrel bends welded together?
Are they made from two halves welded together?
please if anyone knows let me know!
these are the donuts im talking about:
http://secure.chassisshop.com/images/parts/DonutsFull.jpg
http://www.rbracing-rsr.com/turbo/bullett/bul_donut.jpg
http://tunersnation.com/ZenCart/images/categories/alu%20tight%20radius%20bend.JPG
Thanks, Bye!
Looks like two halves to me since you have to finish weld the inner seam. I usually use U bends so I end up with some straight tubing too.
Items Recently Purchased From This Site:
EXHAUST MANIFOLD DONUT U 1996 - 2005 S-10 BLAZER 1996 - 2000 CK, Arctic Cat New OEM Exhaust Head Pipe Gasket Manifold Ring Donut Seal Sno Pro , NEW NAPA VICTOR REINZ EXHAUST MANIFOLD DONUT GASKET 2-1/2" F7139, 05 Polaris RMK 900 Exhaust Manifold Gasket / Muffler Donut Ring Socket Seal IQ, NEW NAPA VICTOR REINZ EXHAUST MANIFOLD DONUT GASKET 2-1/2" PAIR F7139, New GM OEM Exhaust Pipe To Manifold Seal - Gasket - Donut - GM # 22593797, Arctic Cat EXT 580 Exhaust Manifold Ring Gasket / Muffler Y-Pipe Donut Seal 1993, Polaris prox pro x edge xc flange manifold Y exhaust pipe 700 800 2003 04 02 01 , AMC AMX Javelin exhaust donut,NOS 2& 7/16" OD on the part that goes in manifold, AMC AMX Javelin exhaust donut,NOS. 2" OD on the part that goes in the manifold , NOS GM 1989-2001 Chevrolet Geo Metro Exhaust Manifold Donut Seal, Camaro 69 Exhaust System Install Kit Hangers 17-pc small block **In Stock!** z28, kawasaki jet ski coupler donut exhaust manifold joint, NOS 1969 1970 1971 FORD 390 428 EXHAUST MANIFOLD DONUTS, Rt Exhaust Manifold Donut Gasket 99 06 Chevy GMC Truck, Ford Capri Exhaust Manifold Donut Seals Headpipe V6 NOS, NOS 1969 1970 FORD MUSTANG 351W EXHAUST MANIFOLD DONUTS, NOS 1970 1972 FORD GALAXIE 351W EXHAUST MANIFOLD DONUTS, Camaro 67 68 Exhaust System Install Kit Hangers 17-pc Big Block **In Stock!**,