2.5in C/O Kit Pro 7in

The 2.5in C/O Kit Pro 7in from Allstar Performance is a professional-grade carburettor cutoff assembly designed for serious engine builders and performance enthusiasts who demand reliability during high-RPM operation. This kit exists to solve a critical problem: fuel starvation and carburetor float bowl overflow under extreme acceleration, cornering, or inverted conditions common in circle track racing, drag racing, and road course applications. Whether you're running a competition engine or a heavily modified street build, this carb cutoff system prevents fuel from sloshing out of the float bowl and fouling spark plugs or causing lean-out conditions that can destroy an otherwise healthy engine.

The Pro 7in design features a precision-engineered cutoff mechanism that isolates fuel supply to the carburettor during conditions where fuel surge would occur, then immediately restores flow once normal operation resumes. Allstar Performance constructs this kit with durable materials and tight tolerances to ensure repeatable performance across dozens of race events without drift or mechanical wear. The 2.5-inch body diameter matches standard carburettor inlet sizes, while the 7-inch overall length allows for practical mounting in tight engine bay configurations common in vintage and modern racing platforms. Compact at just 1.3 lbs, it adds negligible weight while protecting expensive carburetor and ignition systems from damage caused by fuel contamination.

This carburettor cutoff kit serves bracket racers, circle track competitors, and dedicated enthusiasts who run carb-fed engines in performance applications where fuel system stability directly impacts lap times and engine longevity. Installation is straightforward for mechanics with basic fuel system knowledge—position the kit between the fuel line and carburettor inlet, secure using standard hose clamps, and verify smooth operation through a complete throttle cycle. Compatibility spans any fuel-injected or carbureted engine using a 2.5-inch carburettor flange, making it an intelligent upgrade for anyone serious about maximizing reliability during aggressive driving conditions.