Stainless Works RT225 Rat Trap 2-1/4" Inlet Street Rod Exhaust Muffler

The Stainless Works RT225 Rat Trap muffler is a high-performance, all-stainless exhaust muffler built for street rods, custom builds, and performance vehicles. Constructed entirely from 304 stainless steel — including the body, core, and packing — it delivers exceptional corrosion resistance and long-lasting durability that ordinary mufflers simply cannot match.

At the heart of the RT225 is Stainless Works' exclusive louvered core, engineered to produce a deep, aggressive "Street Rod" tone that ranks approximately 9 out of 10 on the sound scale. This muffler will never burn in, blow out, or change its tone over time, making it equally at home on a daily driver or a weekend racer. It can be run as a standalone muffler or used in increased lengths as side pipes.

Key Features:

• 2-1/4" ID center inlet and outlet with a matching 2-1/4" core
• 3-1/2" round body with a turn-down style tip outlet
• 24" overall length — mill finish standard
• Full 304 stainless steel construction — body, core, and packing all stainless
• Exclusive louvered core delivers deep, consistent Street Rod sound (~9/10 loudness)
• TIG welded throughout for superior strength and clean, durable joints
• Can be welded or clamped in place during installation (fabrication required)
• Tone will never burn in, blow out, or change over the life of the muffler
• Works great as a standalone muffler or in extended side-pipe configurations
• California legal (Prop 65 compliant)
• Backed by a limited lifetime warranty — proudly made in the USA

The RT225 is sold individually and is a universal fit muffler. Installation requires fabrication such as welding and/or cutting to suit your specific exhaust system configuration.