Dynaflex 36-3550 | 3.5" O.D. to 5" I.D. Exhaust Expander | 8" OAL | Made in USA

The Dynaflex 36-3550 is a professional-grade exhaust expander designed for heavy-duty transitions. Proudly MADE IN THE USA, this 8-inch long adapter allows you to bridge a 3.5" component to a 5" pipe. Constructed from high-quality 16-gauge carbon steel, it is the industry standard for truck exhaust repair and custom diesel fabrication.

Technical Specifications

• Part Number: 36-3550

• Small End: 3.5" O.D. (Outside Diameter) — Fits inside 3.5" I.D. pipe/muffler

• Large End: 5" I.D. (Inside Diameter) — Slips over 5" O.D. pipe/stack

• Overall Length (OAL): 8"

• Material: 16 Gauge (.065") Carbon Steel

• Finish: Raw / Unfinished (Weld-Ready)

Key Features

• Extended Taper: The 8" length provides a smooth expansion from 3.5" to 5", reducing exhaust turbulence and backpressure compared to shorter adapters.

• Weld-Ready Construction: Raw carbon steel finish is perfect for immediate welding without the need to grind off aluminized or zinc coatings.

• Industrial Strength: Built by Dynaflex to withstand the high heat and heavy vibrations of diesel engine applications.

• Precision Fit: Engineered to strict tolerances to ensure perfectly round ends and easy slip-fit installation.

eBay Item Specifics