Camotokiit Engine Carburetor Heat Insulator Gasket Spacer — 5/16" Thick Nitrile-Coated with Extended Studs

Camotokiit Engine Carburetor Heat Insulator Gasket Spacer 9265 is a 5/16" thick composite gasket with nitrile coating and extended studs that reduces carburetor heat-soak and fuel percolation for 4‑barrel square‑bore carbs.

This insulated base gasket is designed as a direct replacement for Holley‑style and Edelbrock square‑bore carburetors and mates to square‑flange intake manifolds. Built from composite compounds with a protective nitrile surface, it raises the carb slightly off the manifold to interrupt heat transfer and limit boil-off in the float bowls after engine shutdown. The kit ships with longer carb studs for secure mounting and fits many common Chevy and Ford V8 applications as well as specified Edelbrock and Holley models.

How does this gasket reduce fuel boiling and percolation?

The gasket creates a thermal break between the hot intake manifold and the carburetor, slowing heat conduction into the float bowls. That reduced heat lowers the chance of fuel vaporizing under the carb between runs, improving cold starts and drivability after stop periods. The open‑center dual plane design also helps maintain stable airflow through square‑bore plenum setups.

• 5/16" thickness creates a measurable gap to limit heat transfer
• Nitrile coating resists fuel exposure and oil soak
• Open‑center dual plane form maintains plenum airflow balance
• Included extended studs ensure proper clearance and sealing

Which engines and carburetors will this spacer fit?

This gasket is prepared for square‑bore flange carburetors commonly found on classic V8 engines. It fits Holley 4150‑style carbs and many Edelbrock Performer and Thunder Series square‑bore models. Cross‑reference part number 9265 when checking compatibility for a direct replacement fit.

• Designed for Holley 4150 and Edelbrock square‑bore carbs (1403, 1406, 1407, 1801 series)
• Commonly used on Chevrolet small and big block V8s (283–502 ranges)
• Compatible with Ford 289, 302 and 351 V8 installations
• Fits square‑flange intake manifolds and open plenum applications

What should I consider during installation and clearance checks?

Because the gasket adds height, verify hood and air cleaner clearance before final assembly. Remove the carburetor and stock base hardware, swap in the longer studs supplied, place the insulator against the manifold, and reinstall the carburetor and linkages. Double‑check all fuel and vacuum connections and torque to manufacturer specs.

• Confirm air cleaner-to-hood clearance with added spacer height
• Remove fuel line, throttle linkage and vacuum lines before lift-off
• Replace short studs with provided longer studs for secure mounting
• Recheck for leaks and correct throttle/vacuum operation after install

Who is this for? The Camotokiit 9265 heat insulator gasket is ideal for restorers, street‑rod builders and performance enthusiasts who run Holley‑style or Edelbrock square‑bore carburetors on classic Chevy and Ford V8s and want to reduce post‑shutdown vapor lock, improve cold‑start reliability, and protect fuel integrity under high under‑hood temperatures. It’s suited for anyone seeking a straightforward direct replacement that preserves carburetor geometry while adding thermal protection without extensive modifications.