DNA MOTORING 2.5" Mandrel-Bent Exhaust Tube 45° — 2.5" OD Mild Steel, Flared End for DIY Fabrication

DNA MOTORING's ZTL-PP-25-45-RAW is a 45° mandrel-bent, 2.5-inch outside diameter mild-steel exhaust tube made for do-it-yourself exhaust fabrication and universal vehicle fitment.

If you build, repair or customize exhaust systems, this single 45° bend provides a precise, smooth-radius section to bridge offsets or route piping around suspension and chassis components. The tube is mandrel-bent for consistent inner diameter through the curve, features 18-gauge walls and a natural raw finish so you can weld, clamp or flange it into place. Its slip-fit geometry and one flared opening simplify joining to other sections during shop or home fabrication.

How does this mandrel-bent tube improve custom exhaust fabrication?

Mandrel bending keeps the inner diameter consistent through the curve, which reduces flow disruption and makes alignment with other sections straightforward. The 2.5" OD nominal size matches many common performance systems, while the flared end eases slip-fit assembly and welding preparation.

• Mandrel-bent radius preserves inner profile for smooth exhaust flow.
• 2.5" outside diameter fits standard clamps and adapters.
• Flared opening (2.65" ID) allows slip-fit joints and gap for welding.
• 18-gauge mild steel balances formability and strength for fabrication.

What are the key specifications and how should I measure for fit?

The tube is a 45° bend with 2.5" outside diameter, one end flared to 2.65" inside diameter, and 18-gauge wall thickness. To ensure compatibility, measure the outside diameters of mating pipes and the space where the bend will sit, accounting for clamp or weld overlap and any required extra length for hangers or flex sections.

• 45° fixed bend angle for routing offsets or directional changes.
• 2.5" OD main body with one end flared to 2.65" ID for slip-fit joins.
• 18-gauge mild steel construction; computerized mandrel bends.
• Recommended to verify clearances and joint method before purchase.

How easy is it to install and what tools are needed for a DIY job?

This part is designed for fabricators and experienced DIYers: slip-fit joints reduce alignment hassles, and the raw finish accepts welding, clamping, or banding. Basic shop tools—cutting, grinding and welding equipment—plus clamps and supports will let you integrate this bend into new or repaired exhaust runs.

• Slip-fit flange simplifies positioning during mock-up and tack welding.
• Compatible with common exhaust clamps, welds, or sleeve connectors.
• Requires cutting/grinding tools, clamps, and welding gear for permanent installs.
• Professional installation recommended if unfamiliar with exhaust fabrication.

Will this part resist corrosion and how should I finish it?

The tube ships in a natural, raw mild-steel state and will oxidize if left unprotected. For longevity, treat the surface after fitting: options include high-temperature exhaust paint, ceramic coating, or plating; welding seams should be cleaned and coated as appropriate to reduce rust at joints.

• Raw mild steel requires protective finish for corrosion resistance.
• High-temp paints and ceramic coatings are suitable post-fit options.
• Prep weld areas to remove scale before coating to improve adhesion.
• Stainless upgrades recommended where long-term rust resistance is essential.

Who is this for: Builders, hobbyists and professional fabricators who need a reliable 45° mandrel-bent section for one-off exhaust projects, repairs or performance system routing. If you plan to weld or clamp pipe, require a consistent bend profile and work with 2.5" systems, this DNA MOTORING part gives a precise, easy-to-fit piece—just confirm measurements and finish the steel for corrosion protection before road use.