Marine

Gibson Power Curves Turndown Clamp On Tip, 4-in. inlet, 11-in. overall. Tested up to 1200HP with minimal or no power loss. High quality, Stainless construction. 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 clamp-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

Turn Down Tip; Clamp-On

Part Type

Exhaust Muffler

• Clamp On Design
• High Quality Stainless Construction
• J2005 Sound Ordinance Approved
• 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, Polished Stainless Steel, 4 in. Inlet/Outlet, Center/Center, Angle Cut Outlet, Pair

Gibson Power Curves marine mufflers have been proven to reduce decibel range without compromising power.

Features include:
• Tested up to 1,200 hp
• Polished stainless steel
• Designed for high-horsepower engines
• Large size, maximum flow, maximum effectiveness
• Direct exhaust below water level
• Easy bolt-on utilizing Gibson's exclusive clampless design
• Also available with sound reducer inserts
• No loss in horsepower
• Can be rotated for maximum clearance