3.5" Exhaust Pipe Kit T-304 Stainless Steel Mandrel Bend 8-Piece

Overview

Build a custom exhaust system with the Dynofit 3.5-inch Exhaust Pipe Kit, made from polished T-304 stainless steel for corrosion and heat resistance. The 1.2mm-wall tubing uses smooth mandrel bends to support efficient exhaust flow and includes 8 pieces: straight, 45°, 90°, and 180° tubes. Designed for custom fabrication, the kit requires cutting and welding for installation.

Specification

Material	High Quality Stainless Steel
Surface	Polished
Type	Straight & 45 Degree & 90 Degree & 180 Degree
Thickness	0.05"(1.2mm)
Length	40 Inch Straight Pipe

Feature

• Premium T-304 stainless steel, strong against corrosion and heat

• Smooth mandrel bends improve exhaust flow and power

• 16-gauge walls with TIG welds for lasting durability

• Polished mirror finish for a clean look and easy upkeep

• 8-piece kit with straight and angled pipes for custom builds

• Its polished finish and universal design make it a versatile upgrade for a wide range of vehicle modifications

Package Includes

2X Straight Stainless Steel Tube

2X 45 Degree Stainless Steel Tube

2X 90 Degree Stainless Steel Tube

2X 180 Degree Stainless Steel Tube

Notes

• Installation Instruction is not Included

• For 500–700 hp cars or trucks, a 3.5" exhaust is the ideal size.

• Consult a professional exhaust shop to confirm fitment, installation needs, and cost

• Ensure the exhaust sound complies with local regulations

FAQ

Q: Can this exhaust pipe kit be directly installed, and what does it include? 

A: This is a universal kit that requires cutting and welding for installation. It includes eight 40" polished 304 stainless steel straight pipes; other parts like elbows and hangers must be purchased separately.

 

Q: What parts can I build or modify with this kit?

A: The kit can be used to make downpipes, mid-pipes, axle-back sections, crossover pipes, or to repair rusted sections of the factory exhaust.

 

Q: How do I know if I need a 3.5" exhaust pipe diameter?

A: As a general rule, stock pipes ≤2.5" may upgrade to 3.0–3.5" with engine mods, while stock pipes ≥3" can move to 3.5" after checking engine flow requirements.

How hot do exhaust pipes get?

• Exhaust pipes can reach extremely high temperatures depending on engine load, driving conditions, and exhaust design. Under normal operation, most vehicles’ exhaust systems heat up to around 400–500°F (200–260°C), while during hard acceleration or towing, temperatures can rise to 800–1,000°F (425–540°C). The hottest area is typically the exhaust manifold or header, which may exceed 1,200°F (650°C) before gases cool down along the system.

• As exhaust gases travel through the catalytic converter, muffler, and tailpipe, the temperature gradually drops to around 200–400°F (93–204°C) near the outlet. Factors such as air-fuel ratio, material type, and pipe design also affect heat levels. Because of these extreme temperatures, using heat-resistant materials, wraps, or shields is essential to protect nearby components and ensure long-term performance.