Asphalt Modified CFD 4150 Bases and Filters

Asphalt Modified CFD 4150 Bases 4 hole
Asphalt Modified CFD 4150 Bases 4 hole

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Asphalt Modified Racers.................Bolt on immediate gains of 12-20 HP!


R2C's computer designed CFD 4150 Air Cleaner Bases with Direct Flow technology provide double digit gains in horsepower and torque for Asphalt Modified engines.



Months of design evaluation and flow bench testing, followed by extensive dyno and track tests (now over 400 independent pulls!) conducted by the most respected names in race engine and carburetor assembly, have resulted in the best flowing, highest power producing air cleaner bases for Holley 4 barrel race applications. Every application from Stock Cars to unlimited Late Models and Big Block Modifieds have achieved significant gains in power and response/driveability.

R2C engineers developed each precision base shape to augment the venturi profile of the popular 4150 series Holley carburetor, resulting in dramatically smoother entry profiles and reduced restriction and a much stronger and consistent venturi/booster signal, allowing precision racing carburetors to perform at optimum levels and engines to produce increased power and torque. When used in conjuction with R2C Aspahlt Modified air filter configurations, nothing comes close to the performance advantage R2C CFD 4150 4 barrel bases offer pavement Modified racers.

CFD 4150 4 barrel air cleaner bases are offered in three configurations, allowing racers to select the precision contour that maximizes overall performance based on their individual applications.

* Patents Pending

  • More Horsepower and Torque than any racing air cleaner base available today! 

  • 3 CFD 4150 shaped flow director configurations to choose from

  • Easy interchange versatility that allows you to dyno tune and track test, quickly maximizing horsepower based on the power band of each race car

       Contact your favorite retailer and order yours today!




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