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Thread: Sports cat with OEM cat back - noisy?

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    Pionir's Avatar
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    Default Sports cat with OEM cat back - noisy?

    Just wondering if anyone is running a sports cat (e.g. like the Solid Fabrications offering) with the OEM Honda exhaust behind it on a normally aspirated Type-R (Civic, Accord or Teg)?

    Does it make much more noise than standard or much the same?

    Cheers

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    davidpingu (09-05-2019)

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    I donít have an answer but I have a very similar question to this which is hopefully related enough to your question without it appearing Iím thread-jacking!!

    So I currently have a cpl racing header that came already fitted when I bought the car. As far as I understand, this has effectively removed the cat and is mated up to an oem exhaust.

    While itís done wonders for the torque my car stinks and Iím nervous Mr plod sat 2 or 3 cars back in traffic might take an interest. Iíve also read horror stories that decat cars have broken insurance rules and in the event of being involved in an accident, insurers could refuse to pay out!

    So my question is, if you go custom mid pipe, could you get a sports cat fitted, allowing for most of the additional torque to remain from a freer flowing manifold whilst being back on the right side of the law?!

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    Quote Originally Posted by davidpingu View Post
    I don’t have an answer but I have a very similar question to this which is hopefully related enough to your question without it appearing I’m thread-jacking!!

    So I currently have a cpl racing header that came already fitted when I bought the car. As far as I understand, this has effectively removed the cat and is mated up to an oem exhaust.

    While it’s done wonders for the torque my car stinks and I’m nervous Mr plod sat 2 or 3 cars back in traffic might take an interest. I’ve also read horror stories that decat cars have broken insurance rules and in the event of being involved in an accident, insurers could refuse to pay out!

    So my question is, if you go custom mid pipe, could you get a sports cat fitted, allowing for most of the additional torque to remain from a freer flowing manifold whilst being back on the right side of the law?!
    Insurance is fine as long as its declared, I declared my 4-2-1 decat manifold.

    Mr plod wont be interested as long as your not sat there revving its tits off.

    Its VOSA you don't want to be stopped by but chances are minimal, if you keep your car taxed mot'd and insured.

    Cat in mid pipe is too far away from the action to be effective its been tested

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    Quote Originally Posted by Pionir View Post
    Just wondering if anyone is running a sports cat (e.g. like the Solid Fabrications offering) with the OEM Honda exhaust behind it on a normally aspirated Type-R (Civic, Accord or Teg)?

    Does it make much more noise than standard or much the same?

    Cheers
    Solid fab sytems are meant to be quite boomy from what I have read. Never heard one, but yes you will be introducing more noise.
    I wouldnt bother just swapping to a sports cat unless you are going to go further with the exhaust system and get a remap.

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    How about a Piper manifold with sports cat? I have no personal experience but t's the manifold I want to get for the legality and sensible noise levels.

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    Thatís mad. So as long as youíre insurance company are making more money out of it theyíre happy to insure a car that isnít roadworthy?

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    Quote Originally Posted by Tanny View Post
    How about a Piper manifold with sports cat? I have no personal experience but t's the manifold I want to get for the legality and sensible noise levels.
    Heard mixed reviews, the first year goes quite well MOT wise, then the cat becomes less and less effective.

    Also needs to be red hot to get through MOT, not based on personal experience but this is what I have seen other piper users.

    I would be tempted to get the piper manifold also with the decat section, get it mapped on that, then you can swap the decat for the cat section yearly for the MOT and swap back.

    Much easier than swapping the full header

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    Tanny (15-05-2019)

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    Quote Originally Posted by davidpingu View Post
    That’s mad. So as long as you’re insurance company are making more money out of it they’re happy to insure a car that isn’t roadworthy?
    Been with several companies that insure decat no issues, including some of the big names

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    I wonder if there’s anything to stop VOSA requesting that information

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    Quote Originally Posted by jimbodeeni View Post
    Heard mixed reviews, the first year goes quite well MOT wise, then the cat becomes less and less effective.

    Also needs to be red hot to get through MOT, not based on personal experience but this is what I have seen other piper users.

    I would be tempted to get the piper manifold also with the decat section, get it mapped on that, then you can swap the decat for the cat section yearly for the MOT and swap back.

    Much easier than swapping the full header
    This is a little off-putting. I was hoping it would be a fit and forget solution. Would the car behave ok with a sports cat if mapped with a decat? To be honest one reason why I was interested in the Pipe manifold with cat is to reduce noise. I hate rasp.

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