Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Lexmaul Manifolds

  
  1. #1
    Status
    Offline
    mark-12's Avatar
    AOC Obsessed
    Join Date
    Jun 2005
    Posts
    1,722
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)

    Lexmaul Manifolds

    Looking at upgrading a few things on my car.

    Has anyone fitted a new manifold on their n/a astra?

    I know lexmaul do the manifolds with the built in sports cat, and also do one without the cat shown below:




    Lexmaul Performance Exhaust Manifold X16XEL - Astra G
    Lexmaul exhaust manifolds are excellent 4 branch manifolds made from the highest quality Stainless steel, and come with warranty.


    So bascially:

    Has anyone fitted one of these, or are they any good?

    Would this join on to the end of my exhaust and bascially decat the car?

    Cheers for any help!
    Astra VXR in Star Silver - Officially the 2nd Rarest Colour

  2. #2
    Status
    Offline
    Ffoeg's Avatar
    2170:01:06
    Join Date
    Jun 2003
    Posts
    34,591
    Mentioned in
    2 Post(s)
    Quoted
    0 Post(s)
    what engine have you got?

  3. #3
    Status
    Offline
    mark-12's Avatar
    AOC Obsessed
    Join Date
    Jun 2005
    Posts
    1,722
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)
    1.6 16v

    x16xel?
    Astra VXR in Star Silver - Officially the 2nd Rarest Colour

  4. #4
    Status
    Offline
    Ffoeg's Avatar
    2170:01:06
    Join Date
    Jun 2003
    Posts
    34,591
    Mentioned in
    2 Post(s)
    Quoted
    0 Post(s)
    If you've got that engine and fit that manifold you will still have a cut under the car.

    I've got a Lexmaul mani on mine and the quaility and fit is top notch

  5. #5
    Status
    Offline
    mark-12's Avatar
    AOC Obsessed
    Join Date
    Jun 2005
    Posts
    1,722
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)
    So my cat isnt on the manifold?

    So if i wanted to decat it at a later date, all i would need is a small length of decat pipe??
    Astra VXR in Star Silver - Officially the 2nd Rarest Colour

  6. #6
    Status
    Offline
    Ffoeg's Avatar
    2170:01:06
    Join Date
    Jun 2003
    Posts
    34,591
    Mentioned in
    2 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by mark-12 View Post
    So my cat isnt on the manifold?
    No idea - you tell me which engine you've got - form you last post you don't seem too sure

    But if it hasn't got a manicat, then you can decat with a pipe section, and fail your MOT, and risk the chance of a hefty fine it you get a roadside check form those nice VOSA chaps

  7. #7
    Status
    Offline
    GB's Avatar
    AOC Obsessed
    Join Date
    Jan 2006
    Location
    Leeds
    Posts
    21,918
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Quote Originally Posted by mark-12 View Post
    So my cat isnt on the manifold?
    Nope

    Your CAT is on ur front pipe - only on Z designated engines onwards is the CAT built into the manifold. All X prefix engines (like yours) and earlier have it on the front pipe.

    The problem with the Lexmaul pictured is that you'd have to chop ur existing CAT (or maybe a new CAT) away from the OE front pipe and weld a 2bolt flange fitting (or whatever fitment) to mate it up to the end of the Lexmaul.

    As for a de-cat then youd just need a length of pipe equivalent to the length of the modified CAT you chopped from ur original pipe.

    On older models and some other manufacturers - the CAT is an individual component - but on Vx its either built into the front pipe or mani therefore fitting uprated manifolds mean butchering the cat to make it fit.

    HTH


    EDIT: Just realised u have a 51 plate from ur previous posts....therefore the above is wrong!

    and u do have a mani-cat

    AND..... if that mani is for the X16XEL then its no good for ur Z16XE !

  8. #8
    Status
    Offline
    mark-12's Avatar
    AOC Obsessed
    Join Date
    Jun 2005
    Posts
    1,722
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)
    ive just had a look at my car, my manifold goes from the exhaust valves as normal, then there is a huge cylinder directly vertically underneath this, then it goes down into normal size pipe, then the is a thicker section of the pipe which has a kind of metal mesh over it, (whihc i always thought was the cat)


    So is it the cat on the manifold? if so and i replace this with a new manifold, will the lambda sensor not work? and therefore the engine not work properly?

    And what is the smaller metal mesh thicker piper section?

    So what is my engine code?

    Ive drawn a diagram to assist further:




    Thank you youve been really helpful!
    Astra VXR in Star Silver - Officially the 2nd Rarest Colour

  9. #9
    Status
    Offline
    Ffoeg's Avatar
    2170:01:06
    Join Date
    Jun 2003
    Posts
    34,591
    Mentioned in
    2 Post(s)
    Quoted
    0 Post(s)
    Nice drawing

    The big cylinder on the manfold is the cat, and the mesh thing underneath is a flexible joint.

    I've no idea what yuor engine code will be but it will start Z16

    It not really a good idea to stick that mani on (even if it fits), as you'll still need a (sports) cat and get someone to fabricate the pipework to hook it all together. Buy the time you costed all that out it's usually just as cheap to get the right mani/cat combo for your engine

  10. #10
    Status
    Offline
    mark-12's Avatar
    AOC Obsessed
    Join Date
    Jun 2005
    Posts
    1,722
    Mentioned in
    1 Post(s)
    Quoted
    0 Post(s)
    Ahh the fog clears!! thanks geoff and georgdibandit. both great helps, i cant beleive all this time i thought i had an "x" engine. is there anyway to find out for sure??
    Astra VXR in Star Silver - Officially the 2nd Rarest Colour

Page 1 of 2 12 LastLast

Similar Threads

  1. lexmaul manifolds
    By jimmyflo in forum NA Engines (Non-turbo petrol) inc. Transmissions
    Replies: 2
    Last Post: 06-09-2006, 16:14
  2. lexmaul manifolds
    By gazo in forum Astra Discussion & Chat
    Replies: 5
    Last Post: 06-04-2004, 21:51

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •