10/20/2026
Big airflow. Compact 4150 footprint.
The BLP BX4X was engineered for applications that demand more airflow and performance than a conventional 4150-style carburetor can provide—without moving to a 4500 fl**ge.
Machined from billet aluminum and available with throttle bores up to 2.200 inches, the BX4X platform supports airflow approaching 1,475 CFM while delivering the strength, precision, and adjustability serious racers and engine builders demand.
You can configure and calibrate each carburetor around your engine, fuel, and racing application, including gasoline, alcohol, and E85 combinations.
🇺🇸 Proudly manufactured in the USA
🔧 Billet large-bore 4150 platform
🏁 Purpose-built for serious performance
Discover what the BX4X can bring to your combination at www.blp.com.
Fueling Your Passion for Xtreme Performance.