Phenolic material is renowned for it’s heat insulating properties, which results in a cooler and denser fuel mixture, which in turn produces more horsepower.

Suitable for Holley Squarebore Carburettors.

Includes:

• 1 x 1” Phenolic Open Squarebore Carburettor Spacer
• 1 x Mounting stud and washer kit

Suits Carburettors using Holley Squarebore Style Base