Gibson Marine Bullet Muffler (Pair) Transom Mount - 4in Inlet/11in Length - Stainless

If you're looking to quiet down a high-performance marine engine while keeping power in check, these Gibson Bullet Marine Mufflers are a solid option. Designed specifically for large displacement motors, from 500HP all the way up to 1200HP, they use a straight-through design that works with water to dampen sound effectively. This means you can meet strict sound regulations, like the California SAE J2005 Motorboat Sound Law which requires staying under 88 decibels, without sacrificing the performance you expect from your powerful engine.

These mufflers are built with high-quality stainless steel, so they're well-made to handle the marine environment. They feature an OEM-style transom mount for a straightforward installation, and Gibson states they've been tested up to 1200HP with minimal power loss. The straight-through design is key here; it allows exhaust gases to flow freely, preventing backpressure buildup that can rob your engine of power, while the water integration does the heavy lifting for sound reduction.

When installing these, you'll find they are designed for an easy bolt-on process, which is always a plus when working on a boat. This pair is sold as a set, ensuring you have both mufflers needed for a complete exhaust system. They are also approved to meet the J2005 sound ordinance, giving you peace of mind when operating in regulated waters.