DNA MOTORING 2.5" Mandrel-Bent 90° Exhaust Elbow - 18-Gauge Mild Steel, Raw Finish

DIY mandrel-bent 90° exhaust tube: a 2.5" OD mild steel elbow made for custom exhaust routing and universal fit fabrication.

Built for fabricators, mechanics and car enthusiasts, this DNA MOTORING ZTL-PP-25-90-RAW elbow provides a precision mandrel bend in 18-gauge mild steel so you can route exhaust or intake piping without crimping. Its natural (raw) finish and slip-fit design make it straightforward to trim, weld or clamp into an aftermarket system. Intended as a universal component, the part suits many custom exhaust layouts but should be measured to confirm fit before installation.

How will this 90° bend help when I’m building a custom exhaust?

The smooth mandrel bend preserves internal diameter through the turn, minimizing flow disruptions compared with crushed or poorly formed elbows. That keeps backpressure consistent and simplifies joining with straight sections or mufflers during fabrication.

• 2.5" outside diameter for common aftermarket piping matches many systems.
• Mandrel-bent curve prevents kinks and maintains airflow geometry.
• One end flared to 2.65" ID for easier slip-fit connections.
• Raw mild steel surface is weld-ready for custom joins and brackets.

What are the key specs and material details I should know?

This DNA MOTORING elbow is formed from high-quality mild steel with 18-gauge walls, giving a balance of rigidity and ease of manipulation. The piece is manufactured with computerized mandrel bending for reproducible radius and consistent wall thickness through the curve.

• 90° bend angle for common routing needs.
• 18-gauge (approx. 1.2 mm) wall thickness for fabrication strength.
• 2.5" outside diameter, one flared opening to ~2.65" ID.
• Natural/raw finish ready for welding, coating or painting.

How do I install and fit this elbow into my exhaust system?

The elbow is engineered with slip-fit ends so you can tack, clamp or weld it into place after trimming to length. Always measure clearance for heat-sensitive components and use professional welding or clamping techniques when needed.

• Slip-fit joint speeds alignment and temporary assembly.
• Trim the tube to length with a cutoff wheel or pipe cutter before fitting.
• Use exhaust clamps, V-band adaptors, or welds depending on permanence required.
• Check routing to avoid contact with suspension, drivetrain, or brake lines.

Who is this for? If you’re a DIY fabricator, shop technician, or an enthusiast building or repairing aftermarket exhaust systems, the DNA MOTORING ZTL-PP-25-90-RAW 2.5" mandrel-bent elbow is a straightforward, cost-effective component. It’s especially useful when you need a clean-radius 90° turn that keeps internal diameter intact for consistent flow. Measure your layout and consider professional installation if you’re unsure about welding or exhaust clearances.