DNA MOTORING 3" OD Mandrel-Bent 90° Exhaust Tube — 3" Slip-Fit Flared End, 18-Gauge Mild Steel Raw Finish

This 90-degree mandrel-bent pipe from DNA MOTORING is a ready-to-fit section of exhaust tubing engineered for custom exhaust builds, repairs, and modifications. Constructed from 18-gauge mild steel with a raw natural finish, the piece features a mandrel bend that preserves internal diameter through the curve, helping maintain smooth exhaust flow. One end is flared to 3.15" ID to allow a straightforward slip-fit connection with other 3" components, reducing the need for complex adapters during assembly.

How does the mandrel bend affect performance and fit?

The computerized mandrel-bending process maintains tube diameter around the curve, avoiding the internal crimping you see with pressed bends. That smoother internal profile helps minimize turbulence and supports consistent fitment when joining sections in a custom system.

• Mandrel-bent curve keeps 3" internal flow path consistent
• Computerized forming reduces distortion and weak points
• Better alignment and mating with straight sections than crushed bends

What are the exact dimensions and connection details I need to know?

This elbow is a 90° bend with a nominal 3" outside diameter and 18-gauge wall thickness, suited for standard 3" exhaust piping. One end is flared to a 3.15" inner diameter to provide a slip-fit joint so installers can push it over another 3" tube and clamp or weld as desired.

• Outer diameter: 3.00" (nominal)
• Flared end inner diameter: 3.15" for slip-fit connections
• Wall thickness: 18-gauge mild steel

Is this part easy to use for DIY exhaust fabrication?

Yes — the slip-fit flare and universal design make it straightforward to incorporate into custom systems without specialized adapters. It’s optimized for fabrication shops and experienced DIYers: clamp, tack-weld, or fully weld the joint depending on your installation needs.

• Slip-fit flare simplifies assembly and alignment
• Raw mild-steel finish allows trimming, welding, and grinding
• Works with common clamps, hangers, and 3" tubing components

What should I check before purchasing to ensure fit?

Because this is a universal component, measure your system layout, existing tube diameters, and available space for a 90° turn before ordering. Professional installation is recommended if you’re unsure about cutting, welding, or routing near chassis components.

• Confirm mating tube is 3" OD for slip-fit connection
• Verify clearance for a 90° bend in the intended routing path
• Plan for clamps, welds, or adapters depending on permanence

Who this is for: This DNA MOTORING 90° mandrel-bent exhaust tube is intended for automotive enthusiasts, fabricators, and repair shops building or modifying 3" exhaust systems. It’s ideal for custom pipe routing, replacing a damaged elbow, or creating a prototype system where maintaining internal diameter through bends matters. If you need a ready-to-fit, workbench-ready elbow that trims, welds, and clamps easily, this mild-steel mandrel bend supplies the basic geometry and connection flare to get your project flowing.