Porsche 911 Turbo engines and their KKK turbos
The air-cooled and early water-cooled 911 Turbos used turbos from KKK, short for Kühnle, Kopp & Kausch and now part of BorgWarner, and those are the turbos GP Turbos' Porsche hybrids were built on. Porsche was one of the six makes in the earliest record of GP Turbos' online shop, from April 2019, though the category held only a few products. In 2021 a Porsche listing said that upgrades, standard repairs and hybrids could all be supplied on request.
930 and 964 Turbo
The 930 911 Turbo 3.3 of 1978 to 1989 left the factory with a KKK K26, and the larger K27 is the common replacement. GP Turbos listed a hybrid built on the K27 (5327-970-7200) for the 911 and 964 Turbo, with a 360° thrust bearing, a trimmed turbine wheel and a billet compressor wheel with a 54.75 mm inducer and a 76 mm exducer. The same listing named Audi applications too.
993 Turbo, Turbo S and GT2
Porsche's own history of the 993 Turbo (1995 to 1998) describes its move to two smaller turbos, one for each cylinder bank. The standard 993 Turbo used a pair of K16s; the GT2, the Turbo S and cars with the X50 option used K24s. GP Turbos listed a pair of hybrids built on the K24s (5324-970-7003 and 7004), with large-pad 360° thrust bearings, extended-tip billet compressor wheels, re-profiled covers and cut-back turbine wheels, supplied with uprated actuators and a choice of springs.
996 Turbo
A pair of hybrids for the 996 Turbo was listed as well, built on the original KKK units with upgraded bearings, billet compressor wheels and cut-back turbine wheels.
997 Turbo and later
From the 997 Turbo, things change. Porsche says the 997 Turbo's variable turbine geometry turbochargers were developed with BorgWarner, and the 718 Cayman S and Boxster S with the 2.5-litre engine use the same technology. The 2.9-litre V6 in the Macan, Cayenne and Panamera places its two turbos inside the vee. None of these appeared in GP Turbos' listings, so treat a question about them as the start of a conversation rather than an order. The guide to sticking turbo vanes explains how variable vanes work and why they can stick.
Every hybrid needs supporting modifications and a matching engine calibration to deliver; see hybrid turbos and turbo rebuilds. GP Turbos is independent of Porsche, and model names and part numbers are used here only to identify parts.