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The plastic factory airbox is good at muffling intake noise and enhancing low rpm/low speed engine performance
easy and reliable one-person operation
Audi A4 all models (incl S4) (-2001)
most capable filters in all fields of motorsport from Formula 1 to the World Rally Championship
Turbosmart Manual Gated In-Cabin Boost Controller Color:Blue The plastic factory airbox isThe Turbosmart Gated Boost Control Valve range is one of the best dollar for horsepower upgrades that you can make to your turbocharged petrol or diesel engine vehicle. All Turbosmart Gated Boost Controllers feature our exclusive Gate feature which minimizes wastegate creep and can improve turbo response by up to 800 rpm earlier in the rev range this means that you can increase the performance and response from your engine without even raising the
