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well, your engine moves what, 1.6 liters of air per rotation in a 3.2 l engine? at redline that = 11,500 liters of air per minute. sucking all that air in through a 3" pipe (reduced to 2.7" at the throttle body, and even less at the snorkel) takes work, and any work the engine does to suck that air in is power lost to the wheels. any inefficiencies in this airflow have a proportional effect on performance. something as seemingly minor as the snorkel, or the resonance chambers on an intake tube, will increase engine effort which will reduce horsepower. note, on a 250 hp engine, a 1% loss = 2.5 hp.
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