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Old 12-13-2003, 10:29 PM
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Default 3" mandrel donuts

i cant seem to find the 3" mandrel donuts that were posted up here a few times, i did searches with no luck, any one know where to get em? thanks!
Old 12-13-2003, 10:36 PM
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Default Re: 3" mandrel donuts (Sp00n'd Supra)

kteller8?
Old 12-14-2003, 12:06 AM
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Default Re: 3" mandrel donuts (GudeH23a)

Road Race
Old 12-14-2003, 12:10 AM
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Default Re: 3" mandrel donuts (CRX-RX)

theres some dsm site with them, i cant find it either
Old 12-14-2003, 04:42 PM
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Default Re: 3" mandrel donuts (hybridvteceg)

hm...
Old 12-14-2003, 04:43 PM
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Default Re: 3" mandrel donuts (Sp00n'd Supra)

http://www.roadraceengineering.com
Old 12-14-2003, 04:54 PM
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Default Re: 3" mandrel donuts (RTErnie)

http://www.roadraceengineering...s.htm

thats it, good call.
Old 12-14-2003, 04:55 PM
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Default Re: 3" mandrel donuts (Sp00n'd Supra)

You can get the donuts from: http://www.chassisshop.com
Old 12-14-2003, 05:32 PM
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Default Re: 3" mandrel donuts (TrueNorthStar)

thank you sirs
Old 04-25-2004, 03:32 PM
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Default Re: 3" mandrel donuts (Sp00n'd Supra)



Just thought I'd bump up for good info. I'm starting to lay out my downpipe, and I probably will end up needing one for a tight turn.
Old 04-25-2004, 03:36 PM
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Default Re: 3" mandrel donuts (DaX)

Ok.. maybe I'm just an idiot.. or maybe its lack of sleep... but how exactly do they make a mandrel donut like that? It has no weld marks at any point it appears, so its not like they bend it around the weld it together? *shrug*
Old 04-25-2004, 03:40 PM
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Default Re: 3" mandrel donuts (DaX)

can this clear AC with a 3''? it looks like a tight enough bend.


Rob
Old 04-25-2004, 03:45 PM
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Default Re: 3" mandrel donuts (rjardy)

it wont clear AC unless you have a custom Manifold.. At least w/ an INline Pro mani... I had to modify my 3" DP to clear the AC..
Old 04-25-2004, 03:46 PM
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This bend has radius the same size as the diameter piping [for 3" pipe, it has a 3" radius]. I still don't think you'll clear the AC with most manifolds...at it's least, it's going to be 4.5" away from the flange.

I'm going to use one for my sidewinder setup. Should have PLENTY of room for AC
Old 04-25-2004, 03:47 PM
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Oh yeah, I think they make it by bending it out of a sheet and welding the inner seam.
Old 04-25-2004, 07:43 PM
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maybe IM an idiot but, what the hell do u do with that thing?
Old 04-25-2004, 07:43 PM
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Default Re: (OnPointDX)

allows for a tight bend, like when making a downpipe
Old 04-25-2004, 07:44 PM
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Default Re: (OnPointDX)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OnPointDX &raquo;</TD></TR><TR><TD CLASS="quote">maybe IM an idiot but, what the hell do u do with that thing?</TD></TR></TABLE>

Dude what else do u do with donuts?! U EAT THEM!!!!!!
Old 04-25-2004, 07:50 PM
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Default Re: (VNTEC)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VNTEC &raquo;</TD></TR><TR><TD CLASS="quote">

Dude what else do u do with donuts?! U EAT THEM!!!!!! </TD></TR></TABLE>

lol, preferably with a cup of coffee
Old 04-25-2004, 09:49 PM
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the donuts have an inner seam that needs to welded after cutting. its basically two donut halves welded together then ground down/polished. tight radii bends are nice, expensive, but nice. .with a FR T4 AC mani, you can run a full 3.0 in downpipe with a v-band clamp
Old 04-26-2004, 01:22 AM
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The inner seam is OPEN on that donut.

This is what you make out of it:

Old 05-05-2004, 05:47 AM
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RRE is currently out of steel 3" donuts! I guess I'm going to try Chassis shop.
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