R2C AC10617 Performance 14" Round Holley 4150 Air Cleaner Base
Holley 4150 air cleaner bases
CFD computer designed for unmatched power
Unlock the true potential of your street or race carburetor!
Introducing the most powerful and versatile racing air cleaner bases for Holley 4150 4-barrel applications! Bolt-on double digit power gains.
Smooth radius entry profiles dramatically improve booster signal, increasing horsepower and torque. The result is crisp throttle response, improved pull out of corners and additional straightaway speed.
Outperforms poorly designed, faceted and fluted entry profiles that disrupt the boundary layer and increase drag and turbulence.
Allows precision carburetors to perform as designed!
The best horsepower gain value available today!
Easy power and torque gains:
+9 rear wheel horsepower gain on a 604 crate from many 604 engine specialists!
+16 engine horsepower gain on a dirt modified!
Concerns have been reported from crate and late model racers that are making an attempt to utilize short air filters and steel raised air cleaner bases.
These small filters do not have the capacity to hold dust without raising mid-race restriction to levels that will affect horsepower and response late in races.
An eye-opening example!: testing a 3" oiled gauze filter used on a late model that competed in a fairly dusty, 50 lap event resulted in a loss of 47 horsepower!
Don't do this to yourself!
Stop chasing the latest and greatest from people that are not airflow and filtration experts. We have over 70 years of experience designing sophisticated air cleaner systems.
R2c's patented CFD bases will outperform every air cleaner base made today. They are extremely strong, will not bend and deflect and seal filters even under the most grueling circumstances. Firepower CFD bases allow the use of large air filters which are vital for maximum, undisturbed air flow throughout the longest and dustiest of races.
Do not be deceived and cause yourself unnecessary issues! As racers across the world know, the race proven combination of an r2c firepower CFD base and pro series race filter will serve you extremely well in every condition you will encounter!
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/drivability.
R2C engineers developed each smooth entry, precision base shape to augment the venturi profile of the popular 4150 series Holley carburetor, resulting in dramatically improved entry profiles, 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.
Patented firepower 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!
Patented, smooth radius profile entry design makes more power
3 CFD 4150 shaped flow director configurations to choose from
Ultra-strong, composite construction - no bending, dents and it runs cooler.
Modified and late model engines
dirt modified dyno testing
680 hp baseline
696 hp using r2c firepower CFD 4150 race air cleaner base - w/2 pulls at +18 hp!
excellent power and torque gains throughout the power band.