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  1. #1
    Join Date
    Dec 2015
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    Leicestershire
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    90

    Default 451 Brabus exhaust manifold material grade

    Hi

    Does anyone know the material grade for the 451 exhaust manifold. This is from the engine to turbo inlet. Garage wanted to know prior to attempting welding of crack. Garage said they can only mild steel

  2. #2
    Join Date
    Sep 2016
    Location
    Burnley
    Posts
    653

    Default Re: 451 Brabus exhaust manifold material grade

    It is cast iron.

    I used this on my 450 and it worked for a few years until I sold the car, probably still working now I suppose:
    https://www.ebay.co.uk/itm/Blue-Magi...8AAOSwwP1crdHr

  3. #3
    Join Date
    Jul 2005
    Location
    over here
    Posts
    13,867

    Default Re: 451 Brabus exhaust manifold material grade

    Iíd be a bit concerned about a welding person who canít distinguish cast iron from mild steel .......
    Or without seeing it, that they couldnít guess it would be cast iron....
    fq101.co.uk

  4. #4
    Join Date
    Oct 2017
    Location
    Bury Lancs
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    193

    Default Re: 451 Brabus exhaust manifold material grade

    Cast iron needs to be pre-heated to red hot other wise it will crack alongside the weld (guess how I know). And then the mating face is best skimmed to ensure it's not distorted with the heat. And unless you have facilities & ability to do it yourself IMHO it'd be cheaper & easier to get AN Other manifold.

  5. #5
    Join Date
    Dec 2015
    Location
    Leicestershire
    Posts
    90

    Default Re: 451 Brabus exhaust manifold material grade

    It welded up no problem at all, the manifold had OEM weld joints so most likely was mild steel.

  6. #6
    Join Date
    Oct 2017
    Location
    Bury Lancs
    Posts
    193

    Default Re: 451 Brabus exhaust manifold material grade

    Quote Originally Posted by SUBARB View Post
    It welded up no problem at all, the manifold had OEM weld joints so most likely was mild steel.
    If you grind cast iron you get orange sparks

  7. #7

    Default Re: 451 Brabus exhaust manifold material grade

    The 451 petrol turbo manifold is definitely steel. The diseasel manifold is cast iron.

  8. #8
    Join Date
    Dec 2015
    Location
    Leicestershire
    Posts
    90

    Default Re: 451 Brabus exhaust manifold material grade

    Thanks for the conformation

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