1" Tapered High Velocity Carburettor Spacer Black Finish Suit 4150 Style Flange

Elevate your 4150-style carburettor with Aeroflow’s 1" Tapered High Velocity Spacer in Black Finish. Precision machined from 6061-T6 billet aluminium, this spacer employs Aeroflow’s unique tapered geometry to actively boost fuel/air charge velocity as it enters the carb, delivering more efficient atomization and a noticeably snappier throttle response.

Key benefits

• 1-inch tapered design accelerates the intake charge, promoting improved atomization across the RPM range
• Quicker throttle response and enhanced mid-to-high RPM performance for stronger top-end power
• Insulates the carburettor from manifold heat to reduce heat soak and maintain consistent air/fuel mixtures
• Designed specifically for 4150 Style Flange carburettors
• Built to endure demanding racing and street use while maintaining tight tolerances
• Finish options include raw finish or black anodized for durability and a performance-oriented look
• Reliable upgrade suitable for both daily driving and competitive applications

Materials, finish, and design

Constructed from robust 6061-T6 billet aluminium, this spacer withstands the rigors of racing and street use. The black anodized finish (or raw option) provides a clean look that complements performance-focused builds while protecting against wear and corrosion. Aeroflow’s distinctive tapered geometry actively enhances fuel atomization and charge velocity, delivering tangible gains beyond mere space filling.

Compatibility and use cases

Compatible with 4150 Style Flange carburettors, this spacer is a targeted upgrade for enthusiasts seeking improved air/fuel delivery and throttle response without compromising reliability. Whether you’re dialing in a daily driver for better response or gearing up for weekend track sessions, this spacer supports both practical daily driving and competitive performance.