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CZP has steel lines as an option. The Z1 kit only has silicone. :turbine wheel and the Ni resist cast turbine housing. Unlike the -1 version, the -4 is only available with the cast in wastegate separator. This cast separator doesn't completely keep the turbine and WG flow separated. It only comes about 2/3 of the way to the gasket surface. Because basically all the Z32 downpipes on the market already have a full separator built in, we go to considerable extra expense of having the cast turbine housing separator machined out to avoid complications of removing the separator (and plugging the holes) from a set of downpipes. We also spend considerably more cutting, clocking, rewelding, and smoothing out the compressor housing outlets so no adapters are needed. There are several other extras in Z1 kits that our comeptition doesn't include "yet" like 8 ft of reinforced silicone WG and coolant line, all new copper crush washers, all new turbine housing to downpipe bolts, etc. Before Z1 started offering "complete" Z32 turbo kits with all the lines gaskets, etc, no one else did either, of course now it seems to be standard. We keep adding more and more extras, making changes and improvements and the competition generally follows suit about 12 months behind our lead.
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