how to mount bed stacks?
Thread Starter
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Senior User
Joined: Sep 2009
Posts: 204
Likes: 1
From: in denial.
will a 8 inch piece work? or 10 inch? i was gonna split after the downpipe ( turbo ) into twin 3" pipes, run em along the outside of the frame with 3" glasspacks on each side, then some flex pipe right before the 90 degree elbows for the stacks, up thru bed floor behind cab. with 3" raincaps, heh heh heh..... clink-clinky -clink-clink -clinkety-clink........
Postmaster
Joined: Apr 2008
Posts: 4,802
Likes: 1
will a 8 inch piece work? or 10 inch? i was gonna split after the downpipe ( turbo ) into twin 3" pipes, run em along the outside of the frame with 3" glasspacks on each side, then some flex pipe right before the 90 degree elbows for the stacks, up thru bed floor behind cab. with 3" raincaps, heh heh heh..... clink-clinky -clink-clink -clinkety-clink........
i ain't rite
Joined: Mar 2005
Posts: 65,481
Likes: 5,542
From: Marlboro Mental Hospital.
your plan is a sound one. that is how i have mine done with the exception of no mufflers for 18 years.
now i have a 3 inch flomaster at the end of the down pipe, and the y at the end of the muffler.and i run flex pipe from the 90 at the frame to the 90 where it turns up into the bed. this makes the frame side of the exhaust solid, and the 24 inch piece of flex pipe under the cab and bed along the frame picks up all the flex.
now i have a 3 inch flomaster at the end of the down pipe, and the y at the end of the muffler.and i run flex pipe from the 90 at the frame to the 90 where it turns up into the bed. this makes the frame side of the exhaust solid, and the 24 inch piece of flex pipe under the cab and bed along the frame picks up all the flex.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
My stacks are frame mounted since my bed dumps.
I ran solid pipe all the way, just left the down pipe clamp a little loose so it can twist as the frame flexes.
No problems in many years.
I ran solid pipe all the way, just left the down pipe clamp a little loose so it can twist as the frame flexes.
No problems in many years.
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Postmaster
Joined: Oct 2005
Posts: 3,724
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From: Clarksburg WV
I had a very short piece of flex pipe on my old setup, but my downpipe was loose like Dave said his was so maybe I didn't even need the flex pipe. In fact now that I think about it the flex pipe probably wasn't really doing anything.
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Thread Starter
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Senior User
Joined: Sep 2009
Posts: 204
Likes: 1
From: in denial.
flex pipe is illegal ? even the braided steel stuff ? ( i know the 'corrugated pipe' stuff is illegal, but even the braid ? that sucks....maybe some d.o.t. boat rubber pipes, huh ? hah !) thanks again for all the replies, this board ROCKS...
Posting Guru
Joined: Jul 2004
Posts: 1,627
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From: West Valley Utah
The flex tube or pipe used for stacks is stainless, used on exhaust for years and years and years and, did I say years. Used on trucks, heavy equipment, agriculture equip exc. Link to some 3 inch: Stainless Steel Exhaust Flex 3" ID
No it's not illegal!
No it's not illegal!
Elder User
Joined: Oct 2007
Posts: 541
Likes: 1
I run a single stack, straight pipe from the turbo out, but I do have a flex pipe in the mix. It's about 1' long, mounted at the front of the 90 degree bend that goes up through the bed, and I've definitely twisted my truck as far as it can twist in any given direction. It has yet to let me down.