LCGP 4" Mandrel Straight Exhaust Pipe — 48" Mild Steel, 4" Inlet/Outlet

This straight exhaust pipe from LCGP gives you a precision 4" inlet and outlet in a single 48" length, built from quality mild steel for strength and dependable fitment. It’s engineered for mandrel-style bending processes and manufactured to maintain consistent inner and outer diameters so sliding-fit joints and slip connections work smoothly. Whether you’re fabricating a custom exhaust, repairing a damaged section, or lengthening an existing 4" system, this pipe serves as a durable, straightforward component for performance or restoration projects.

How does this pipe maintain a reliable fit with my 4" system?

The pipe is produced with consistent inner and outer diameters typical of mandrel-formed tubing, which helps ensure repeatable slip-fit connections and predictable assembly. Its 4" inlet and outlet match standard 4" exhaust components so you can join it with clamps or welds without extensive modification.

• 4" nominal inlet and outlet designed for 4" exhaust systems
• Mandrel-quality geometry for round, uniform tubing
• Sliding-fit joints allow for clamp or sleeve connections
• 48" overall length reduces the need for multiple couplers

What is the material and how will it hold up over time?

Constructed from high-quality mild steel, this tube balances cost and strength for many automotive and fabrication uses. Mild steel is easily welded and handled in typical shop environments; however, it is more prone to surface corrosion than stainless options unless painted, coated, or otherwise protected.

• Mild steel construction for strength and straightforward welding
• Suitable for shop fabrication and custom exhaust builds
• Best used with protective coatings or thermal wraps where corrosion resistance is required
• Replaceable section — cost-effective for repairs and modifications

How easy is installation and what tools or skills are recommended?

Installation is simple if you’re familiar with basic exhaust work: measure, cut if needed, slide the tubing into place, and secure with clamps or welds. For clean, durable joins and correct alignment, professional installation or experienced DIY skills are recommended.

• Designed for sliding-fit assembly with clamps or sleeves
• Can be welded using common MIG or TIG methods
• Cut-to-length friendly for custom routing and fitment
• Professional installation advised for best performance and safety

What should I check before buying to make sure it fits?

Measure the outer diameter of existing piping and the space available along the exhaust run to ensure the 48" length fits without interference. Also confirm you want mild steel and plan for surface protection if the vehicle operates in corrosive environments.

• Confirm your system uses 4" nominal tubing (measure bore and OD)
• Verify 48" length is compatible with vehicle routing and hangers
• Plan clamps, sleeves, or welds for joining the pipe ends
• Consider corrosion protection or coatings if exposed to road salt

Who this is for: The LCGP 4" Custom Mandrel Straight Exhaust Pipe suits mechanics, fabricators, and experienced DIYers who need a long, consistent-diameter section to repair, extend, or customize 4" exhaust systems. It’s ideal for custom builds where a single, uniform-length piece reduces joins, for shops that prefer mild-steel weldability, and for hobbyists who will apply protective coatings when corrosion resistance is important. If you require stainless steel or integrated bends, consider other LCGP options; if you want an affordable, straight, mandrel-quality 48" section for 4" systems, this pipe is a practical choice.