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So I've now got a straight through on my motor and to be honest its far to loud for me. I need a quietish exhaust. That flows well and can be hidden. I don't want it sitting under the bumper. The idea of the 2.1 was to be fairly stealthy.
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Centre box as a backbox is quite a common one to do
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Seems a bit restrictive imo. Ive got a spare centre box I can use I need be.
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Straight through system to a normal backbox is quite a good one, looks stock from the back.
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Im not sure what the standard back box is like for flow though. Any ideas?
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^^ This.. I thought the centres were essentially 'straight through' just with baffles around them
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Ok fair enough. I will now be trying to find a good centre box or a back box for next month.
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New pattern centre sections are cheap enough iirc, that's the better option than a backbox as above, it still won't be quiet though.
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(21-04-2015, 12:42 PM)Seb_Ryan Wrote: (21-04-2015, 10:33 AM)bashbarnard Wrote: Seems a bit restrictive imo. Ive got a spare centre box I can use I need be.
The middle box is a hell of a lot less restrictive than the backbox..
Depends which backbox you use
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Im not after an oem quietness. Just something a touch quiter than that.
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Just to echo what has been said, you just want a straight through box with some baffling.
Will just dull the noise down.
I've had both on my HDi and its a lot less 'thundery' having baffles.
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Ok so any universal back box really.
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Get some bits from jettex and make yourself up a 2.5" twin box system, some of their silencers are pretty big and if you don't have a spare wheel you could fit a load of them.
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Just before I left work today had a BMW 320d estate in and the back box is 2 1\2 inch pipe work and looks beefy enough to keep things quiet enough for my liking. May have a scrap yard run happening now.
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![[Image: Ty8kl7b.jpg]](https://i.imgur.com/Ty8kl7b.jpg)
i think it would sound low and rumbly but not too noisy and have sufficient flow 
![[Image: 9fa12c59-0c3d-4413-968d-6a7840ff068f.jpg]](http://i693.photobucket.com/albums/vv295/highwayman306/9fa12c59-0c3d-4413-968d-6a7840ff068f.jpg)