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Replacing the stock delivery valves in your 12 Valve can substantially increase the low end power and fueling, in turn aiding in turbo spool up.������
The 191's are one stage above the stock 181 delivery valves on the later model 12 valves to aid in fueling larger injectors.Kit comes complete with 6 Delivery Valves, 6 Washers, and 6 Gaskets
