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Thread: Removing centre silencer from exhaust

  
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    Removing centre silencer from exhaust

    I,m considering replacing the centre silencer on my astra with a straight through pipe from the cat to the backbox.....

    Has anyone done this and does it make the exhaust unbearably loud or not my main reason is for a custom stainless straight through is £60 +VAT or with the silencer is £140 +VAT...........

    CHeers

    Viper
    Drives - 97 Vectra SRI 2.5 V6 24v

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    LordNikon's Avatar
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    Surprisingly enough, the standard silencer is not that restrictive. I felt a big boost on my turbo car when it was removed, but the majority of this was down to the larger bore of exhaust. Noise wise, I wouldn't have thought it would change much TBH.

    You will probably only get 3Bhp max from a NA 2.0. Coupled with a less restrictive back box, you may see 5-6 bhp and some more noise.

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    It shouldn't get too loud, as the back box does a lot of the work. You might find that there loud 'patches' in the rev range though. I know a guy who had a duplex system on his car with no middle silencers. It was quiet at idle and at top revs, but at around 4000 rpm it was really boomy and used to set off car alarms as he went past

    Fun, but did rather attract the attention of the Police :shock:

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