PMAS Silicone Reducer Coupler 3.5 inch to 4 inch

Silicone Reducer Coupler – 3.5″ to 4″

The Silicone Reducer Coupler 3.5″ to 4″ is the perfect solution for joining mismatched intake or intercooler piping sizes in high-performance applications. Whether you’re adapting components in a turbo system or custom intake setup, this coupler ensures a smooth, leak-free transition between pipe diameters.

Constructed from multi-ply reinforced silicone, it offers outstanding durability, heat resistance, and flexibility—ideal for both street and track environments. Designed to withstand elevated temperatures and boost pressures, this reducer is built to perform under pressure.

Product Highlights:

• Reducer Size: 3.5″ to 4″
• Material: High-strength multi-layer silicone
• Heat Resistant: Suitable for high-temp engine bay environments
• Flexible Fit: Adapts different pipe sizes for smooth airflow transitions
• Reinforced Construction: Withstands vacuum and boost conditions

Applications:

• Turbocharger systems
• Cold air intake builds
• Intercooler piping transitions
• Custom engine swaps and modifications