Thermal Tip - 4' Dia x 8' Long x 3' Inlet, Angle Cut

Thermal R&D 4308A Polished Exhaust Tip 4in Outlet x 8in Long x 3in Inlet Angle Cut

The Thermal R&D 4308A is a dual-wall, angle-cut exhaust tip machined from T304 stainless steel and mirror polished to a show-quality finish. With a 4in outlet, 3in inlet, and 8in overall length, the 4308A slides directly over any 3in exhaust pipe and locks in place with a band clamp or weld for a permanent install. The angle cut delivers an aggressive, forward-swept appearance that gives any build a performance-oriented rear end presentation. Dual-wall construction shields the outer barrel from exhaust heat, keeping the polished surface free from heat tint and carbon buildup long after installation. Precision formed and welded in Lancaster, CA, every Thermal R&D 4308A tip meets the same exacting tolerances used in Thermal R&D complete cat-back systems.

Key Features

• T304 stainless steel with a deep mirror polish that resists rust and corrosion
• Dual-wall barrel keeps the outer surface cool and free from heat discoloration
• Aggressive angle cut for a forward-swept, race-inspired appearance
• 4in outlet diameter, 3in inlet diameter, 8in overall length on the 4308A
• Clamp-on or weld-on installation - no drilling or fabrication required
• Made in Lancaster, California by Thermal R&D
• Covered by Thermal R&D Limited Lifetime Warranty to the original vehicle owner

What's Included

• 1x Thermal R&D 4308A polished T304 stainless steel angle-cut exhaust tip

Specifications

Frequently Asked Questions

1. What exhaust pipe diameter does the 4308A fit? The 4308A is designed for a 3in inlet, fitting any exhaust pipe with a 3in outside diameter.
2. What is the outlet diameter of the 4308A? The outlet measures 4in in diameter, providing a noticeable size increase over the inlet for an aggressive look.
3. How long is the Thermal R&D 4308A? The 4308A is 8in in overall length, giving a substantial presence at the rear of the vehicle.
4. Is the 4308A single-wall or dual-wall construction? Dual-wall. The inner wall carries exhaust gases while the outer barrel stays cool, preventing heat tint on the polished finish.
5. Does the 4308A require welding to install? No welding is required. A band clamp over the 3in inlet secures the 4308A firmly in place. Welding is an option for a permanent install.
6. Will this tip discolor from exhaust heat? The dual-wall design isolates the outer polished barrel from direct exhaust heat, significantly reducing heat tint and carbon staining compared to single-wall tips.
7. Is the 4308A sold as a single tip or a pair? The 4308A is sold individually. Order the quantity matching the number of exhaust outlets on your system.
8. Where is the Thermal R&D 4308A manufactured? Every 4308A is precision formed and welded in Lancaster, California at the Thermal R&D facility.
9. What warranty does the 4308A carry? Thermal R&D provides a Limited Lifetime Warranty to the original vehicle owner. The warranty is non-transferable and does not cover commercial or racing use.
10. Can the 4308A be polished if it gets scratched? Yes. T304 stainless steel can be re-polished with a stainless steel polish compound and a polishing wheel to restore the mirror finish.

Installation Instructions

1. Allow the exhaust system to cool completely before handling.
2. Clean the end of the exhaust pipe to remove rust, carbon, or debris that would prevent a flush seating of the 4308A.
3. Slide the 3in inlet of the 4308A over the exhaust pipe outlet and position to the desired angle and depth.
4. Tighten a stainless steel band clamp over the inlet to secure. Torque to clamp manufacturer specification.
5. For a permanent install, MIG or TIG weld around the inlet circumference after positioning.
6. Check alignment and confirm the tip does not contact the bumper or valance at any suspension position.

Prop 65 Warning: This product can expose you to chemicals including Nickel (Metallic), which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.