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Through optimised gas flow technology
The all-new GPF/PPF-Back quad exit performance exhaust with rear silencer perfectly compliments the 'jack of all trades' character of the M135i
The Forge Nissan R35 GTR intake uses much larger (80mm) than the stock pipework for massively improved flow and higher horsepower potential
the narrow bore plastic inlet pipe restricts the air flow on stage 1 and 2 tuned vehicles
Hard Pipe and Blow Off Kit for BMW 135i, 335i, & 1M (N54 Engine) Part_GPF Back Through optimised gas flow technologySuitable for the BMW 135i, 335i, & 1M fitted with the N54 Twin Turbo engine. This alloy hard pipe fits to the throttle body and incorporates our high flow blow off valve. This valve, expertly engineering by our R&D department, is the largest displacement valve that Forge have ever made! Featuring a 50mm (2) aluminium piston so that there are no issues with split diaphragms, we have not found the power handling limits of this valve yet! The piston uses