LS Cathedral Port Cylinder Head to Rectangle Port 92mm 102mm Intake Manifold

LS Cathedral Port Cylinder Head to Rectangle Port Intake Manifold Adapter for GM

These adapter plates allow a rectangle port intake manifold to mount onto cathedral port cylinder heads.

Overview

The LS Cathedral Port Cylinder Head to Rectangle Port Intake Manifold Adapter for GM bridges the physical gap between mismatched cylinder heads and intake manifolds. This LS Cathedral Port Cylinder Head to Rectangle Port Intake Manifold Adapter for GM allows you to run high-flowing 92mm or 102mm rectangle port manifolds on existing cathedral port heads. This kit is ideal for engine builders looking to optimize airflow without purchasing new cylinder heads.

Built For Performance

• CNC-machined from premium billet aluminum for maximum strength and flatness
• Includes high-quality sealing rings to ensure a vacuum-tight connection
• Precisely matches the port shapes to maintain smooth airflow transition
• Accommodates both 92mm and 102mm rectangle port intake manifolds

Fits These Machines

• for GM LS Series Cathedral Port Cylinder Heads

On-The-Job Use

• Adapting a late-model rectangle port intake manifold onto an older LS engine block
• Custom engine building for hot rods and race cars requiring hybrid manifold setups
• Maximizing intake plenum volume on budget-conscious high-performance builds

Specs At A Glance

Good To Know

Q: Are the intake port seals included with this adapter kit? A: Yes, the package includes the necessary rubber seals to complete the installation on both heads.

Q: Will this require modifications to my hood clearance? A: The adapters add a small amount of height, so verify your clearance before finalizing the hood installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.