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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Wed, Sep-26-2018, 09:29:52 PM   #1
GeorgeH
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Default Aftermarket Plenum Clamps

I'm looking for aftermarket worm style hose clamps to use on the boots that connect the plenum to the throttle bodies, I need the clamp on the TB side. I would normally use the factory clamps but these are going on a car that would need to be serviced at the track and ease of use is more important than originality.

The kicker is I want a smooth inside surface so they don't eat at the boots when tightened. Like this:
https://www.ffx.co.uk/tools/product/...e-Clip-55-70Mm

I have a set already that say "PEARL" on them, but can't find that anywhere on google. The size range is 55-70mm.

Thanks
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Old Wed, Sep-26-2018, 09:45:48 PM   #2
Braymond141
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Default Re: Aftermarket Plenum Clamps




Just used these on a member's car. On the TB side of the boot, they are a bit too long for my taste. I hate seeing the excess tongue sticking out. On the plenum side I used the OEM Oetikers, but these worm gear might fit better. These are the same clamps BMW use and do not damage the boot like typical worm gear clamps from the auto store do.

I would like to try these next, but just be warned, the sizes don't always make sense. I have to guess and check a lot with clamps on my refurbished supercharger kits.


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Old Wed, Sep-26-2018, 09:47:41 PM   #3
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Default Re: Aftermarket Plenum Clamps

I like Zebra clamps. They aren't perforated but formed.

There are others that have an inner liner so the perforations can't touch the hose in the normal range of use.

They're usually listed under "silicone hose clamps".
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Old Wed, Sep-26-2018, 10:25:23 PM   #4
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Default Re: Aftermarket Plenum Clamps

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Originally Posted by Braymond141 View Post
NORMA 01266704060-000-0542 Hose Clamps, 50 mm-70 mm x 9 mm W4 (Pack of 10): Amazon.com: Industrial & Scientific

Just used these on a member's car. On the TB side of the boot, they are a bit too long for my taste. I hate seeing the excess tongue sticking out. On the plenum side I used the OEM Oetikers, but these worm gear might fit better. These are the same clamps BMW use and do not damage the boot like typical worm gear clamps from the auto store do.
I found those during my searches, but according to the picture listed with them they are serrated on the inside and not smooth, can you confirm the picture is incorrect in that regard?

I to, don't like the excess length, maybe I'll order the short ones too and give them a go.
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Old Wed, Sep-26-2018, 10:27:56 PM   #5
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Default Re: Aftermarket Plenum Clamps

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Originally Posted by Zzyzx85 View Post
I like Zebra clamps. They aren't perforated but formed.

There are others that have an inner liner so the perforations can't touch the hose in the normal range of use.

They're usually listed under "silicone hose clamps".
Do you have a link, the only "Zebra" clamp that I find is sold by Wurth that is smooth is 10-16mm
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Old Wed, Sep-26-2018, 10:46:58 PM   #6
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Default Re: Aftermarket Plenum Clamps

I use the turner worm gear clamps on the tb to manifold side as they're quick and easy. I've removed the manifold probably 100 times in the past so efficiency is key. These seal perfectly. I use oem on the boot to manifold side as those just look proper and you shouldn't be removing those frequently anyway. Worm gear can cause clearance issues on that side if they're the wrong type.

These in 50-70mm for the ITB side

https://www.turnermotorsport.com/p-3...clamps/?pdk=Cw
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Old Wed, Sep-26-2018, 11:26:14 PM   #7
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Default Re: Aftermarket Plenum Clamps

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Originally Posted by GeorgeH View Post
Do you have a link, the only "Zebra" clamp that I find is sold by Wurth that is smooth is 10-16mm
https://wurthusa.com/Service-and-Rep...ve/p/053915070

these might be too wide:
https://wurthusa.com/Service-and-Rep...70/p/054925070

From McMaster-Carr:
https://www.mcmaster.com/#5076k19
https://www.mcmaster.com/#5413k61
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Old Thu, Sep-27-2018, 01:50:53 AM   #8
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Default Re: Aftermarket Plenum Clamps

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Originally Posted by GeorgeH View Post
I found those during my searches, but according to the picture listed with them they are serrated on the inside and not smooth, can you confirm the picture is incorrect in that regard?

I to, don't like the excess length, maybe I'll order the short ones too and give them a go.
They are the same style as your OEM clamps for the cooling system (thermostat housing for the S54). That Turner link above shows them perfectly. They are smooth enough to not tear up the boot, but they will leave an indent.
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Old Thu, Sep-27-2018, 04:18:32 AM   #9
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Default Re: Aftermarket Plenum Clamps

There's a few options here: http://www.m3forum.net/m3forum/showthread.php?t=533062
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Old Thu, Sep-27-2018, 02:00:34 PM   #10
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Default Re: Aftermarket Plenum Clamps

Thanks guys, but all of the worm style listed above are not smooth on the inside like what I'm looking for. The ones Clawhammer linked are the closest to what I'm after so far. I'll pull some off of another plenum and take a pic to show y'all what I'm looking for.
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Discussing Aftermarket Plenum Clamps in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)