Kooks R300-10 3 in. Round Weld On Muffler 10 in. Body T304 Stainless Steel

Short Body 3 Inch Round Stainless Muffler for Tight Exhaust Packaging

The R300-10 is a 3 inch round weld on muffler with a 10 inch body, built from T304 stainless steel for performance exhaust fabrication where a shorter muffler body length is required. Vehicles with limited undercarriage space between axles, frame rails, or other hard points sometimes cannot accommodate a longer muffler body without routing the exhaust in a less than ideal path. The 10 inch body of this muffler provides sound attenuation in a more compact overall length, giving fabricators the flexibility to position the muffler in the optimal location without compromising adjacent pipe routing.

The 3 inch inlet and outlet of the R300-10 keep the full tube diameter through the muffler body for maximum flow, and T304 stainless construction ensures the assembly holds up to the corrosive and thermal demands of a performance exhaust system. For builders who need a quality weld on 3 inch muffler in the shortest body length available in the Kooks round muffler lineup, this muffler is the answer. It pairs directly with the R300-14 for builds where one side of a dual exhaust has more room than the other, or where a single muffler in a tight mid chassis location is the preferred configuration.

Key Features

• 3 inch inlet and outlet for 3 inch exhaust system compatibility
• Compact 10 inch body length for tight undercarriage packaging
• Round body profile for standard fabrication integration
• T304 stainless steel construction for durability and corrosion resistance
• Weld on installation for a permanent, leak free connection
• Universal fitment for custom fabrication and replacement applications

What's Included

• 1 x 3 inch round weld on muffler with 10 inch body

Specifications

Frequently Asked Questions

What pipe size does this muffler require?
This muffler has 3 inch inlet and outlet connections for weld in installation into 3 inch exhaust tubing.

What is the advantage of the 10 inch body over a 14 inch body?
The 10 inch body is shorter, making this muffler easier to fit in exhaust systems where space between axles, frame components, or other hard points is limited. It is the compact option in the Kooks round 3 inch muffler lineup.

Is this muffler louder than the R300-14?
Generally yes. The shorter 10 inch body has less internal volume, which means slightly less sound attenuation compared to the 14 inch body. This muffler will typically produce a more aggressive tone at similar system configurations.

How is this muffler installed?
This muffler is welded into the exhaust system at both the inlet and outlet. Both connections are welded to adjacent 3 inch exhaust tubing.

What material is this muffler made from?
T304 stainless steel, providing corrosion resistance and long service life in a demanding exhaust environment.

Can I use this muffler in a dual exhaust system?
Yes. For a dual exhaust layout, two mufflers are required. This muffler is sold as a single unit.

Will this muffler work on a turbocharged build?
Yes. T304 stainless construction is appropriate for turbocharged applications with elevated exhaust temperatures.

How does the sound of this muffler compare to a straight pipe?
This muffler provides meaningful noise attenuation compared to a straight pipe, reducing the harshness and peak volume of the exhaust note while preserving the performance character of the system.

Installation Instructions

1. Allow the exhaust system to cool before beginning fabrication work.
2. Determine the muffler location, accounting for the compact 10 inch body length.
3. Cut the 3 inch exhaust tubing at the inlet and outlet positions.
4. Position the muffler with the inlet facing the engine.
5. Verify round body clearance to surrounding components at ride height.
6. Tack weld to confirm alignment, then complete full circumference welds at both connections.
7. Use T304 compatible filler for clean welds.
8. Inspect for leaks after first startup and heat cycle.

Prop 65 Warning

WARNING: This product can expose you to chemicals including Chromium and Nickel, which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information go to www.P65Warnings.ca.gov.