Testimonials

"I used to go about a half a season and the bottom of my intake plenum would have dirt or basically just a mud consistency on the bottom and down the runners.  I was using K/N type oiled filters that need to be washed and re-oiled with dirt still getting through filter which created blow-by and rebuilds more frequently. My motor builder kept asking me if was cleaning my filter out enough. I then talked to you and tried your filter and it worked just like you said. I did not need any grease around the seal area of filter. I have used your filter for a full season and washed it multiple times throughout the season it has held up great.  I looked at my motors intake plenum at the end of this season with your filter and it was completely clean!  Your product works exceptional, it works just like you guys at R2C said it would! 

Ray Bollinger
 
 

CFD 4150 4 Barrel Direct Flow Air Cleaner Bases

 
CFD 4150 race air cleaner- 4 hole Direct Flow
CFD 4150 race air cleaner - 4 hole Direct Flow
 

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 Now available in Show Stopping finishes!    

 

Available in Blue, Red, Purple, Lemon, Orange and Limited Edition Pink.

P1010278  

              AC10616BL finished in Electric Blue

 

s07 SummitRacing 132

Pbodies Decal Logo

Motorstate

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 And many other quality performance products dealers!

 

 

 

large0 1850C

Use Base AC10710 for this style and for tall, flat top choke housings.

1.39" Choke Tower Height.

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Use Base AC10709 for short and flat choke towers. 

1.05" Choke Tower Height.

CFD Designed holley 4150 air cleaner bases

 

Unlock the true potential of your race carburetor!

Introducing the most powerful and versatile racing air cleaner bases for Holley 4150 4 barrel applications!   Bolt-on double digit power gains.

Precision Booster Signal and entry profile Increases torque and provides crisp throttle response.  improved pull out of corners and additional straightaway speed.

Allows precision carburetors to perform as designed!

  

 easy power and torque gains

   +9 rear wheel horsepower gain on a 604 Crate! 

   +16 engine horsepower gain on a Dirt Modified!

  

 

Months of design evaluation using CFD and flow bench testing, followed by extensive dyno and track tests (now well over 1000 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 conjunction with R2C Late Model/Modified air filter configurations, nothing comes close to the performance advantage R2C CFD 4150 4 barrel bases offer racers in applications from Stock cars to the highest horsepower open engines.

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. Strong and durable, R2C CFD bases won't dent or deflect, causing filter sealing issues.

* Patents Pending

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

  • 3 CFD 4150 shaped flow director configurations to choose from

  • Ultra strong composite Nylon Construction - No bending, dents and it runs cooler.

       Contact your favorite performance retailer

 


 Modified and Late Model Engines

 

       Dirt Modified dyno testing 

       680 HP Baseline

       696 HP using R2C CFD 4150 Direct Flow race air cleaner base - w/2 pulls at +18 HP!

       Excellent power and torque gains throughout the power band.

      

 


       Attention 602 and 604 Crate Engine users

      maximum power to keep you in front!

 

          AC10617 CFD 4150 base and R10523 filter is the best combination.  

           Use lid AC10521 or AC10520  

        9-14 rear wheel horsepower gains!

 

      * Use AC10617 with HEI Distributors

  
     
Racer's: Contact R2C with Technical/Application Questions:  racing@r2cperformance.com

   

 

    

AC10615 CFD 4150 Air Cleaner Racing Base - 1" Height Above Flange - Open Flow Director      1 3/8" Drop
AC10616 CFD 4150 Air Cleaner racing Base - 1" Height Above Flange - 4 Hole Flow Director    1 3/8" Drop
AC10617 CFD 4150 Air Cleaner racing Base - 2" Height Above Flange - Open Flow Director          3/8" Drop

 

AC10618 CFD 4150 Race System - Includes 3 Shaped Flow Directors, Base and gaskets.            
                                                                         Unassembled components for testing. (No Plungers)

 


R2C CFD 4150 bases and Flow Directors are now available for Holley carburetors that maintain choke housing such as the Double Pumper series, Street Avenger TM and Ultra models.

Bolt-On Double Digit Horsepower and Torque Gains!

 

  *Holley Ultra HP - Use AC10617 due to extended bowl length.

    Applications for Braswell 4825 carburetors available soon!

 

Base Dimensional Drawings


          PDF

               AC10617 Base

           PDF

                  AC10615  Base     

       

 

 
 

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