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Cupra 280 - JB1 kit

Discussion in 'Leon Mk3 (2012-2020)' started by CupraBenny, Jan 31, 2019.

  1. CupraBenny

    CupraBenny Active Member

    May 18, 2014
    Likes Received:
    Hi all,

    I managed to grab a 2nd hand JB1 kit off ebay for £130, and it's due to arrive this weekend. I have watched a few videos on Youtube, but some actual owner advice would be great!

    1 - For fitting, everyone mentions a plug at the bottom of the front of the engine, can this be accessed from above or is it an undertray removal job?

    2 - Real world gains, will this improve my MPG with casual everyday driving?

    3 - Will the increase in power be obvious? I believe these kits add around 50bhp?
  2. Cupra Belfast

    Cupra Belfast Active Member

    Jun 11, 2016
    Likes Received:
    1. It's an under-tray removal job. There's just a few bolts holding the under-tray on. Fitting or removal of a JB1 is a 20 min job all in.

    2. It'll do retain the same mpg as unless you put your foot down, the jb1 isn't doing anything and you're running on the car's own ECU, so no different. When it operates it's seamless. Just the same, but more of it.

    3 It'll add 30-50 bhp depending on your fuel. The better the RON, the better the output. You'll certainly notice it. Check out the thread on here about solving traction issues and do the things listed on there to make the most of it.

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