Gibson Exhaust 310003 Power Tip Marine Muffler Transom Mount 4in Inlet Stainless Pair

The Gibson Performance 310003 Power Tip Marine Muffler is a premium transom-mount silencer built for performance boaters who demand both quiet operation and full engine output. Constructed from highly polished T-304 stainless steel, this muffler is engineered to withstand the harsh marine environment while delivering a clean, factory-style appearance at the transom.

Featuring a straight-through, superflow design with a 4-inch center inlet and 4-inch overall length with a rolled edge tip, the 310003 utilizes water to naturally dampen exhaust sound — with tested results showing minimal to no power loss. The OEM-style transom mount fits flush and is flanged and trimmed for swim step clearance, giving your boat a clean, finished look.

Gibson's patented clamp-less mounting system makes installation straightforward — no special tools required. The muffler can also be rotated for maximum clearance during installation.

Key Features:

• Highly polished T-304 stainless steel construction for corrosion resistance
• 4-inch center inlet / 4-inch overall length with rolled edge tip
• Straight-through superflow design with minimal or no power loss
• Utilizes water to dampen exhaust sound
• OEM-style transom mount — flanged and trimmed for swim step
• Gibson's patented clamp-less system for easy bolt-on installation
• Meets California SAE J2005 Motorboat Sound Law (88 dB limit)
• Sold as a pair
• One-year limited warranty against manufacturing defects and material workmanship

The Gibson 310003 has been proven to reduce decibel levels to within — and even surpass — the 88 dB limits required by the California SAE J2005 Motorboat Sound Law, making it a compliant choice for boaters in regulated waterways across the United States.