The Full-Race 3" to 4" Silicone Transition Coupler is a durable and necessary component for creating a smooth, straight-line diameter transition from 3.0 inches up to 4.0 inches in turbocharger intake and charge pipe systems. Constructed from high-quality 3-ply fiberglass reinforced silicone with a 0.110-inch wall thickness, this coupler is designed for strength and longevity. It is commonly used in applications requiring a large intake pipe to connect to a smaller turbo inlet, or a larger turbo outlet to an existing smaller airbox or Mass Air Flow (MAF) sensor housing.

Features

• Designed for a smooth, straight-line diameter transition from 3.0 inches to 4.0 inches.
• Constructed from durable 3-ply fiberglass reinforced silicone.
• Features a wall thickness of 0.110 inches for strength and reliability under boost.
• Ideal for connecting components with a substantial difference in size, such as large intakes to turbo inlets.

Notes

• Commonly used for connecting a 4" intake to a 3" turbo or a 4" turbo to a 3" airbox or MAF sensor.
• Requires appropriate clamps (sold separately) for secure installation on both ends.

Compatibility Notes

• Suitable for custom intake and charge pipe fabrication involving a transition between 3.0-inch and 4.0-inch piping.

Specs

• Size: 3.0 inches to 4.0 inches (Transition)
• Material: 3-Ply Fiberglass Reinforced Silicone
• Wall Thickness: 0.110 inches