K-4 Series Racing Carburetor

Our K4 Series Carburetor is focused for the nitrous/ naturally aspirated racer in mind .  This carburetor is made with a billet aluminum center section. As always, these are custom calibrated per your racing application.

Features:

•  Billet construction for our 4150 and 4500 designs
• Custom boosters per application
• IRD Billet base plate for our 4150 designs
• Adjustable throttle linkage 4150/4500
• Cast aluminum fuel bowls with big sight windows
• Teflon bushing inserts for better throttle shaft sealing
• IRD K4 billet metering blocks (2 or 3 circuit design per application)
• Adjustable air bleeds
• High flow needle and seat custom to your specs
• Compatible with Gas 

          ***Rated R Carburetor is recommended for E85 and alcohol combinations