DNA MOTORING ZTL-PP-25-45-RAW 45 Degree DIY Custom Mandrel

Whether you're patching, routing, or fabricating a custom exhaust, this 45-degree bend tubing provides a durable, slip-fit section engineered for easy alignment and welding. Finished raw for flexibility in painting or coating, the pipe uses computerized mandrel bends to preserve flow and minimize deformation through the curve. It’s supplied with one flared end to simplify mating to adjacent sections or clamps during installation.

How does this 45° bend improve a DIY exhaust project?

The mandrel-bent curve keeps the internal diameter consistent through the turn, reducing flow restriction and turbulence compared with crushed or poorly formed bends. For custom routing, a precise 45° angle lets you change direction predictably without multiple welded joints.

• Mandrel-bent to maintain internal shape and improve exhaust flow.
• One 2.65" flared opening eases slip-fit connections and clamp placement.
• 45° change reduces the need for stacked elbows, lowering welds and potential leak points.

What are the material and dimensional details I need to know?

This section is constructed from 18-gauge mild steel and measures 2.5" outside diameter, a common size for custom and replacement sections. The raw finish is ideal for welding, coating, or ceramic spraying depending on your project needs.

• 2.5" OD main tube with one flared opening at approximately 2.65" ID for slip-fit joins.
• 18-gauge wall thickness for a balance of strength and ease of bending/welding.
• Computerized mandrel forming for consistent bends and reduced wall thinning.

How easy is it to fit and install on my vehicle?

Designed as a universal-fit component, the slip-fit geometry lets you align and tack-weld quickly or clamp sections temporarily to test fitment. Because universal parts require measurement and occasional trimming, they’re best used by hobbyists or professionals comfortable with fabrication.

• Slip-fit joints simplify assembly and mock-up without custom flaring equipment.
• Raw finish accepts welding and common surface coatings for corrosion protection.
• Universal profile suits many exhaust systems but check lengths and diameters first.

Who is this for? This DNA MOTORING mandrel exhaust tube suits home fabricators, performance hobbyists, and professional shops building or repairing custom exhausts. It’s ideal when you need a reliable 45° offset that preserves flow, reduces fabrication time, and accepts standard exhaust clamps or welds. If you prefer a finished look or require corrosion resistance out of the box, plan to coat or finish the tube after installation. Professional installation is recommended if you’re unsure about fitment, cutting, or welding techniques.