Thermal Tip - 4' Dia x 8' Long x 3' Inlet

Thermal R&D 4308 Universal Exhaust Tip 4in Dia x 8in Long x 3in Inlet Polished

The Thermal R&D 4308 is a polished dual-wall flat cut exhaust tip measuring 4 inches in outer diameter, 8 inches in overall length, with a 3-inch inlet. This versatile universal tip is made in Lancaster, California, USA to the same quality standards as all Thermal R&D exhaust products. The 4308 features a polished stainless steel outer wall over a dual-wall construction, providing the classic bright tip appearance with added heat insulation between the inner and outer walls. The flat cut end delivers a clean, professional look suitable for street, sport truck, and custom applications running 3-inch exhaust systems.

Key Features

• 4-inch outer diameter x 8-inch length x 3-inch inlet universal exhaust tip
• Polished stainless dual-wall construction for premium appearance
• Flat cut end for a clean, symmetrical look
• Universal slip-fit design for 3-inch exhaust pipes
• SKU 4308 manufactured in Lancaster, CA USA by Thermal R&D
• Limited Lifetime Warranty to original vehicle owner (non-transferable)

What's Included

• 1x Thermal R&D 4308 universal exhaust tip

Specifications

Frequently Asked Questions

1. What exhaust pipe size does the 4308 fit? The 4308 is designed for a 3-inch inlet, meaning it fits exhaust tailpipes measuring 3 inches in outer diameter.
2. Is the 4308 universal? Yes. The Thermal R&D 4308 is a universal slip-fit tip not specific to any vehicle. Verify your exhaust outlet is 3 inches before ordering.
3. What is the difference between 4308 and 4308A? The 4308 has a flat cut end for a clean symmetrical look. The 4308A has an angle cut end for a sporty asymmetric style. Both share the same 4-inch diameter, 8-inch length, and 3-inch inlet dimensions.
4. How is the tip secured to the exhaust? The tip uses a slip-fit design secured with an exhaust clamp at the 3-inch inlet end. No welding required.
5. Is this tip polished or coated? The 4308 has a polished stainless steel finish on the dual-wall outer shell.
6. Where is the 4308 made? Thermal R&D manufactures all products including the 4308 in Lancaster, California, USA.
7. Does the dual-wall design have a functional purpose? Yes. The dual-wall construction insulates the outer decorative shell from direct hot exhaust gas contact, helping preserve the polished appearance and reducing heat shimmering.
8. What warranty applies to the 4308? Thermal R&D provides a Limited Lifetime Warranty to the original vehicle owner. Non-transferable, excludes commercial and racing use.

Installation Instructions

1. Allow the exhaust system to cool completely. 2. Confirm your exhaust outlet pipe is 3 inches in outer diameter. 3. Slide the 4308 tip over the exhaust outlet. 4. Adjust to desired position and angle. 5. Tighten the inlet clamp securely. 6. Start the vehicle and verify there are no exhaust leaks at the connection.

Prop 65 Warning: Exhaust system components can expose you to carbon monoxide and other chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.