*New

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Spyder DFR 4150 Air Cleaner Bases

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Bolt on double-digit horsepower and torque gains in minutes!

*Computational Fluid Dynamics designed and dyno tested

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Spyder Dynamic Flow Regime racing air cleaner bases for 4150 Holley carburetors unleash hidden engine power by maximizing the main body pressure profile and dramatically improving venturi/booster signal while eliminating entry turbulence.

The result is incredibly precise and responsive carburetor performance, improved power, torque and control.

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