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    • Excellent Porsche 991 Carrera S/4S 3.8 powerkit article and X51 option history overview courtesy of Porsche Engineering Magazine

      A great article below courtesy of Porsche Engineering Magazine that covers the history of the Porsche Power Kit, or X51 as the option is designated, option over the years. The option is not cheap for the 991 Carrera S/4S at $17,800 and for that money you get a 30 horsepower bump. Yes, there are cheaper ways to get 30 horses on the 991 Carrera S 3.8 liter flat-6 motor but the Porsche Power kit comes with some parts hard to source otherwise.

      For example, revised cylinder heads. Additionally, revise camshafts and tuning to go with them. Finding an aftermarket source for these parts with comparable tuning to make them work is not easy. They certainly will not be tested, engineered, or developed to the level Porsche did it themselves. While $17,800 is a lot of money you get a package that is tried and tested with a warranty so it has its appeal. Many will argue one should take that money and just get a GT3 but the Power Kit option has existed since the 996 days and some people prefer the S or 4S models rather than the sharper GT3.

      The article below explains the Power Kit better than anyone, well worth the read.











      This article was originally published in forum thread: Excellent Porsche 991 Carrera S/4S 3.8 powerkit article and X51 option history overview courtesy of Porsche Engineering Magazine started by Sticky View original post
      Comments 5 Comments
      1. leveraged sellout's Avatar
        leveraged sellout -
        Yeah if you can afford it, I'd say get it. Then you have an even better platform to mod. These parts are not easy to find anywhere else.
      1. Sticky's Avatar
        Sticky -
        You won't be getting better cylinder heads or cams for cheap elsewhere. These are tried and true.

        You can get the powerkit from other sources for cheaper. At close to $10k it makes more sense.
      1. Remonster's Avatar
        Remonster -
        Click here to enlarge Originally Posted by Sticky Click here to enlarge
        You won't be getting better cylinder heads or cams for cheap elsewhere. These are tried and true.

        You can get the powerkit from other sources for cheaper. At close to $10k it makes more sense.
        Don't forget that it also includes the dynamic engine mounts, sports exhaust, sports chrono package, etc. It's not a bad deal if you were going to get all these things anyways.

        Now that the GT3 automatic-only (I'm calling it an auto just to be mean), I would probably go for a manual Carrera S and the power kit is a good way to gain some top end power with that awesome sports exhaust. I also kind of like how compliant and soft the C2S is compared to a GT3 but if I wanted it to be more hardcore I'd spend my money on some Ohlins coilovers and maybe see if some of the GT3 bushings, control arms, etc. could be swapped over.
      1. LZH's Avatar
        LZH -
        Porsche marketing at it's finest. For that king of money, you could spend less and get a clean 2008 GT3 and send it to Sharkwerks for their 3.9L conversion that is bulletproof and makes 500hp.


      1. Sticky's Avatar
        Sticky -
        Click here to enlarge Originally Posted by LZH Click here to enlarge
        Porsche marketing at it's finest. For that king of money, you could spend less and get a clean 2008 GT3 and send it to Sharkwerks for their 3.9L conversion that is bulletproof and makes 500hp.


        http://www.youtube.com/watch?v=kSz_r...yer_detailpage
        Definitely but some people want the newer body style. It's just another option and it's cool that Porsche offers so many different options.