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1FG is the two front sections of the Cat Back (H Pipe and Mid-Pipes)
Vehicle Fitment
Dyno-Proven Gains up to +13 HP and +35 Lbs
Precision engineering and design have produced an exhaust that delivers a unique sound from its full high-grade titanium construction
Made from lightweight Neoprene material
K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5 - 57S-4000 Shift Boot 1FG is the two frontThe K&N 57S 4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57S 4000 Performance Airbox comes with an
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