Vibrant 13170 304 SS 3 in. Oval to 3 in. Round Transition Adapter 6 in.

Vehicle Fitment

• Universal - No vehicle-specific fitment. Compatible with any custom exhaust, downpipe, header, or intercooler piping fabrication application requiring a 3 in. oval-to-round transition.

Fitment Notes

• This is a universal fabrication component. Installer must verify oval profile dimensions match existing tubing before installation.
• Oval end dimensions: 3 in. x 2-3/16 in. Confirm compatibility with mating oval tubing prior to welding.
• Professional TIG or MIG welding recommended for a proper seal.

Features

• T304 stainless steel construction resists heat, corrosion, and acidic exhaust gases
• Eccentric oval-to-round profile allows smooth, flow-efficient shape transitions
• 16-gauge (0.065 in.) wall thickness balances rigidity with weldability
• Raw finish is weld-ready for MIG, TIG, or stainless filler applications
• 6 in. overall length provides adequate transition distance to minimize turbulence
• Non-magnetic alloy with high chromium and nickel content for long-term durability
• Compatible with Vibrant mandrel bend tubing, clamps, and V-band flanges
• Ideal for exhaust systems, custom headers, downpipes, and induction piping

Specifications

• Part Number: 13170
• Material: T304 Stainless Steel
• Inlet: 3 in. Oval (3 in. x 2-3/16 in.)
• Outlet: 3 in. O.D. Round
• Overall Length: 6 in.
• Wall Thickness: 0.065 in. (1.65 mm) - 16 Gauge
• Finish: Raw (Natural)
• UPC: 690092123741

Included Components

• 1x Vibrant 13170 Oval to Round Transition Adapter, 3 in., T304 Stainless Steel, 6 in. Long

Product Description

The Vibrant 13170 is a T304 stainless steel transition adapter designed to bridge the gap between 3 in. oval tubing and 3 in. round O.D. tubing in custom fabrication applications. The eccentric profile gradually shifts the cross-section from oval to round over a 6 in. length, reducing flow turbulence and keeping exhaust velocity consistent through the transition. It's built from 16-gauge stainless with a raw finish, making it straightforward to weld into place using TIG or MIG techniques.

This adapter is a go-to component for builders working on custom cat-back exhausts, downpipes, or headers where factory oval sections need to mate with round aftermarket tubing. Its compatibility with Vibrant's broader lineup of mandrel bends, reducers, and couplers makes it easy to integrate into a complete fabrication build. Always verify the oval end profile dimensions against your existing tubing before installation to ensure a flush, weld-ready fitment.