Most of the KKK K26 turbos were off of Audis and Porches with engines around 2.1L. I think it is based on an old design, so it probably isnt as efficient or fast-spooling as today's turbos. It probably has a unique exhaust housing flange too, making it harder to buy/make a manifold for it. Are you going to get one cheap or something? If so, does it have a watercooled center section or just oil? If its cheap, I'd still get it.
And I believe KKK makes large turbos also, but dont hold me to it..
From what I understand, the watercooled turbos started being used in 1986, so that turbo is likely a later one. Since its an external wastegate, that'll make it harder to do a junkyard set up because now you have to get a custom manifold.
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