Marine

Gibson Bullet Marine Mufflers 4.50-in. inlet, 11-in. overall. Tested up to 1200HP with minimal or no power loss. High quality, Stainless construction. OEM style transom mount. Straight through design. Utilizes water to dampen the sound. These silencers were specifically designed for Large displacement motors such as 500HP, 502, 525, 525SC, 575. and up to 1,200hp. Easy bolt-on installation. The Gibson Marine Mufflers have proven to reduce decibel ranges within and to surpass the 88db limits required by the California SAE J2005 Motorboat Sound Law without compromising power.

Additional Information

Bullet Muffler; Clamp-On

Part Type

Exhaust Muffler

• High Quality Stainless Construction
• J2005 Sound Ordinance Approved
• OEM Style Transom Mount
• One Year Limited Warranty
• Sold As Pair

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Product Downloads

#	Document Type	Download
1.	Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Mufflers, Superflow Marine, 4.50 in. Inlet/5.00 in. Outlet, Stainless Steel, Polished, Pair

These Gibson Superflow Bullet marine mufflers are proven to reduce decibel range to within the 88 dB required by the California SAE J2005 Sound Law, without compromising power.

Features include:
• Tested on 496, 525, and 575 hp
• Flow-tested to ensure maximum effectiveness
• Straight-through design
• No loss in horsepower
• Clamp-on, hassle-free installation utilizing Gibson's exclusive clampless design