After alot of research, I finally purchased a filter for our Late Model and could not be happier. We ran paper filters before and had to run grease on the cleaner and it seemed dirt still made it through. Now with the R2C filter we do not have to mess with the grease and our carb is cleaner. We will now buy one for our modified.
Lueken Racing #12

Track Control Carburetor Spacers






Contact us at racing@r2cperformance.com with questions or for help selecting of the best performing products for your application.






R2C *Track-Control Carburetor Spacers

Stop Getting beat by crate's. Get out Front and stay there!     

Dirt Modified's finish 1-2-3 using Track Control spacers!


When you get beat out of corners on slick tracks, it may not be the skill of the other driver that's doing that to you!  Many of these teams are now relying on Track Control spacers from R2C for a smooth application of corner power while maintaining an advantage in straightaways.


For the days when getting a grip on a dicey track presents problems for even the best Late Model and Modified teams, R2C Track-Control carburetor spacers help solve the problem by applying smooth and consistent power to get you to the front. Take the edge off when driving out of corners and plant the power rather than blowing the tires off!

Holley 4150 Track-Control spacers are designed to limit power production and control torque by reducing bore size from 1.75" to 1.25".  In Dirt Modified testing, Track-Control spacers provide a power reduction of 55-65 HP with a corresponding reduction in torque on 675-700 HP engines.  Track-Control carburetor spacers are designed to maintain perfect A/F quality and booster signal. The venturi shaped profile also helps control reversion while the phenolic construction provides outstanding strength and helps control carburetor temperatures.

Every team should have one or two in their toolbox!


Now available in Super Tough Clear Polycarbonate and Phenolic versions!

*New - 3 throttle bore sizes available so you can select the the appropriate spacer based on track conditions or the system that includes all three!

  • 1.25"   Bore CS10500
  • 1.125" Bore CS10503
  • 1.00"   Bore CS10501
  • CS10504 Includes all three sizes

1 inch height.


A Mod's  - USMTS Type engines 675-700 HP

  • CS10500  60-70  HP/TQ. reduction
  • cs10503  75-85  HP/Tq. reduction
  • cs10501 90-100 hp/tq. reduction

IMCA Mods - 600-625 HP


  • CS10500  40-55  HP/TQ. reduction
  • cs10503  60-75  HP/Tq. reduction
  • cs10501  75-85  hp/tq. reduction


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