Bronco ATV Exhaust Valves

Engine valves control the way an engine “breathes”. Every cylinder in an internal combustion engine contains a set of intake valves and exhaust valves. Intake valves open and close the passages inside the cylinder head. This is where air and fuel mix together and are ignited by the spark plug, thus causing a small explosion. Intake valves are larger than exhaust valves. Exhaust valves let the waste gases escape the combustion chamber and pass out through the exhaust. As engine RPMs increase, the valves open and close accordingly. Hard use can cause valves to get dirty and encrusted with carbon (from engine oil aspiration or “blow-by”), and excessively high RPMs have the potential to cause valve misalignments, bends, and snaps which, ultimately, have the potential of destroying an engine.

Bronco ATV is a sub brand of Minnesota-based company, Namura Technologies. Namura Technologies is an aftermarket producer of pistons, rings, gaskets, bearings, and engine components for ATV, UTV, and powersports engines. They specialize in ATV and UTV components such as suspension parts, winches, and accessories. Bronco’s exhaust valves are available for utility and sport performance ATVs and UTVs. These are OEM replacements that are made from robust SUH35B heat-resistant steel and are finished in Nitride for enhanced protection against corrosion. Performance valves receive a swirl polish and smooth stem treatment and are made from 21-4N/SUH35HT Stellite-tipped forged stainless steel. Discount Starter & Alternator is a retailer of Bronco ATV parts. Browse our expansive online catalogue and find high-performance Bronco ATV exhaust valves for popular ATVs and UTVs.