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What diameter tubing for bellows?

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Old Mar 21, 2008 | 07:17 PM
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Default What diameter tubing for bellows?
Just curious what the diameter is for the bellows for our vehicles? My tape measure it buried god knows where or I'd measure it myself, lol.
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Old Mar 21, 2008 | 07:33 PM
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the smooth bellow is 3.5
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Old Mar 21, 2008 | 09:10 PM
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depends on what lid/ tb/ maf combo u r using.
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Old Mar 21, 2008 | 09:34 PM
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Does it really matter? It will be going from a Fast 90 to a MTI clear lid, no MAF. I did a search and everyone says you can use a stock bellows on a 90mm set up so assumed the normal bellows size would work for me.
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Old Mar 22, 2008 | 08:18 AM
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Originally Posted by Gregg 00SS
Does it really matter? It will be going from a Fast 90 to a MTI clear lid, no MAF. I did a search and everyone says you can use a stock bellows on a 90mm set up so assumed the normal bellows size would work for me.
yes it def matters. on a stock tb u need a 3.5"-3.75" max hose. then u have to account for either a78mm stock maf or an 85mm maf (larger outer diameter) then there are lids that have a larger mouth the accept an 85mm maf without a couple or just a standard lid that accepts the stocker. u can squeeze a stocker on there if u trim the **** out of it and it will never fit on a stock car again. same can be done with the slp bellow. but then u have to account for the gap where the maf used to reside. so in short stay away from that jazz. i got a 4"x6" coupler from intakehoses.com and it went right on. its a hair big on the lid side but when u tighten the clamp it fits perfectly fine. this is the best i can do for a picture as i havent taken any since i was in the middle of working on it.


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Old Mar 22, 2008 | 11:10 PM
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Actually, I'm looking for exactly what you have. I was just trying to find out exactly what diameter I need so I could order it. Wasn't planning on trying to fit a stock bellows on my setup, lol. Guess I'll order a 4x6 one, thank for the help.

BTW, I should be coming back over either the end of this coming week or the following weekend, have to check my schedule. I'll let you know so we can meet and I can get the bezel.
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Old Mar 23, 2008 | 01:30 AM
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can't you just test fit in about 2 mins? ...have heard the stock bellow will fit the 90/90 platform
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Old Mar 23, 2008 | 08:00 AM
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Originally Posted by RrCoX22
can't you just test fit in about 2 mins? ...have heard the stock bellow will fit the 90/90 platform
like i said it will. it just needs to be trimmed/ strecthed over and it will never fit a stocker afterwards.
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Old Mar 23, 2008 | 09:32 AM
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Save yourself some money and head on over to the plumbing department at home depot. By a Fernco 4" inlet 3" outlet coupling for $6, trim about 2-3 cm off of one side and install. Instant bellow. This is on a 90mm, btw.
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Old Mar 23, 2008 | 05:45 PM
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Originally Posted by Fabrizi
Save yourself some money and head on over to the plumbing department at home depot. By a Fernco 4" inlet 3" outlet coupling for $6, trim about 2-3 cm off of one side and install. Instant bellow. This is on a 90mm, btw.
How did you get the 4" side of that Fernco onto the TB?

I tried that part a few months ago, and there was so much extra space all around the TB to the 4" fernco it was rediculous.

Am I missing something?
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Old Mar 23, 2008 | 07:40 PM
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Originally Posted by Michael02hawk
How did you get the 4" side of that Fernco onto the TB?

I tried that part a few months ago, and there was so much extra space all around the TB to the 4" fernco it was rediculous.

Am I missing something?
no ur not missing anything. look at it closely and u will see how deformed it is.
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Old Mar 23, 2008 | 11:34 PM
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Originally Posted by ls2 bait
no ur not missing anything. look at it closely and u will see how deformed it is.
Ah yes, but it's still on there.
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