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Thread: Exhaust and precat removal for 2.8 V6

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    Default Exhaust and precat removal for 2.8 V6

    After some advice here guys.

    I think my car is being limited by my standard tuck-under exhaust and I'd like to get one that will enhance power without being too loud. Would also like to ditch the pre-cat.

    Any suggestions?

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    Regular Member rushy's Avatar
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    Vehicle : SRi


    Engine : Z22SE (2.2 Petrol)

    Year : 2004

    Mileage : 137000

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    You need the two pre cats but you can get rid of the main cat. Pm voxter mate, im sure he's done it on his vxr

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    Quote Originally Posted by stampede View Post
    After some advice here guys.

    I think my car is being limited by my standard tuck-under exhaust and I'd like to get one that will enhance power without being too loud. Would also like to ditch the pre-cat.

    Any suggestions?
    You can remove the center section(main cat + middle silencer) for around £80-£100 and still pass MOT emmissions, whether or not this gives gains is debatable as many argue the point, you can also remove the pre-cat by purchasing a replacement from Courts and fitting it, there is a snag though, If you are tuned by Thorney then you will have to ask them to alter your map to account for the removal of the pre-cat, even if you go for a sports cat to comply with emmissions you will still have to get Thorney to adjust the map to stop the dash lighting up and unfortunately you would need to travel to their HQ and it will probs cost you to get it adjusted.

    The worst part is TMS may void your Tuners warranty if you do this as it would mean you are using parts not tested with there maps and of course made by other Tuners.

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    Thanks for the replies.

    I have a remap from a local tuning place called Remap Science. Really happy with it. Problem is that, while the car is pretty brutal mid-range, the top end is a bit flat. In fact, there's little point revving the car past 4200rpm or so cos the next gear up will be quicker!

    If I put a pre-cat replacement in, would I need new software?

    And could you point me to where I could buy the centre section replacement?

    Thanks mate

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    the revs on my 2.8 go all through the range its pretty smooth but it revs to redline and doesnt loose any power at all ??

    0-Large smile ......every time it's driven

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    Quote Originally Posted by stampede View Post
    Thanks for the replies.

    I have a remap from a local tuning place called Remap Science. Really happy with it. Problem is that, while the car is pretty brutal mid-range, the top end is a bit flat. In fact, there's little point revving the car past 4200rpm or so cos the next gear up will be quicker!

    If I put a pre-cat replacement in, would I need new software?

    And could you point me to where I could buy the centre section replacement?

    Thanks mate
    I would get that checked m8, 5k should be when the turbo starts to feel flat and a gear change is needed on mapped cars not 4k.

    On my car 3rd and 4th are upto 5.3k before the power dies off and 5th and 6th the power hold till around 6k.

    You can get the replacement exhaust section made up at any custom exhaust place and you won't need anything adjusted, if your going to change the downpipe removing the pre-cat though you will need your software adjusted to account for the difference in emissions that the e.c.u will pick up.

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