Billet Velocity Stack for PWK 21–30mm Slide Carburetors – 2.5" Filter Adapter

Billet Velocity Stack for PWK 21–30mm Slide Carburetors – 2.5" Air Filter Adapter

Upgrade your airflow and filter compatibility with EC’s Billet Velocity Stack, designed for PWK 21mm to 30mm slide carburetors. This precision-machined velocity stack adapts your carburetor to accept standard 2.5-inch (63.5 mm) air filters, offering improved performance, smoother airflow, and enhanced filtration options.

Perfect for mini bikes, go-karts, and high-performance small engine builds, this stack not only boosts throttle response but also ensures a snug, secure fit for cone-style filters.

Key Features:

• CNC-machined billet aluminum for strength and heat resistance
• Allows Nibbi &PWK 21mm–30mm slide carbs to run 2.5-inch air filters
• Tapered design improves airflow velocity and reduces turbulence
• Lightweight yet durable—built for track and off-road abuse
• Sleek finish to complement race-ready carb setups

Dimensions:

• Outer Diameter (OD): 2.5 inches / 63.5mm
• Inner Diameter (ID): 1.960 inches / 50mm
• Always verify carburetor dimensions for proper fitment

Whether you're tuning a high-RPM mini bike or dialing in your go-kart for race day, this billet velocity stack helps you get more from your PWK carb setup—both in performance and compatibility.