Carburettor Phenolic 1" 4 Hole Spacer Gaskets and Mounting Hardware

Phenolic Carburettor Spacer 1" Thick, 4-Hole with Gaskets & Mounting Hardware

Aeroflow’s phenolic carburettor spacer is a 1" thick, 4-hole design engineered to optimize air/fuel distribution while cooling the fuel for a denser mixture. By increasing plenum volume and reducing vapor lock, this spacer helps unlock additional engine performance and smoother throttle response.

The thermoset phenolic resin acts as an effective heat barrier between the intake manifold and the carb, helping to keep fuel temperatures steady during operation. Built to resist warp through heat cycles, the spacer maintains stable metering under demanding conditions, even in high-load, hot-running applications.

This design is particularly beneficial for aftermarket or custom throttle cable/linkage setups, offering improved clearance and compatibility with complex linkage geometries. Designed for 4150 square bore manifolds, the spacer is available in multiple heights and in either open or ported configurations to precisely match your intake system.

Each variation includes gaskets and mounting hardware (studs) to simplify installation and ensure a secure, leak-free fit.

Key advantages

• Enhanced air/fuel distribution for a denser, more efficient combustion mix
• Lower fuel temperatures to reduce vapor lock and improve consistency
• Increased plenum volume supporting stronger mid-range and peak performance
• Improved linkage clearance with aftermarket or custom throttle setups
• Superior heat isolation minimizes heat transfer and resists warp
• Rigid 1" thickness with a 4-hole design for reliable mounting on 4150 square bore manifolds

Design options and compatibility

Spacer thickness: 1 inch; Hole pattern: 4-hole; Material: thermoset phenolic resin; Configurations: open or ported; Heights: multiple options to fit diverse intake applications

Designed specifically for 4150 square bore manifolds, with multiple height options to suit your air intake and linkage geometry needs.

What’s included

• Phenolic spacer (1" thick, 4-hole)
• Gaskets
• Mounting studs (hardware) for install