3.5in To 2.5in Reducers (pair)

The HOOKER 3.5in To 2.5in Reducers are engineered exhaust system components designed for boaters and marine engine builders who need to transition larger diameter exhaust piping down to smaller outlet sizes. These collector reducers are essential when adapting exhaust manifolds or headers to standard transom exhaust systems, or when reconfiguring exhaust routing on rebuilt or modified marine engines. Whether you're restoring a classic runabout, upgrading a fishing boat's exhaust, or customizing an inboard-outboard system, these reducers provide a dependable solution for proper exhaust flow management.

Constructed from steel with a durable black paint finish, each reducer in this pair features a 3.5-inch inlet and 2.5-inch outlet, with a 3-bolt flange connection that ensures a secure, leak-free seal. The three-bolt mounting system is industry standard across marine exhaust applications, allowing these reducers to integrate seamlessly with most OEM and aftermarket exhaust manifolds. The steel construction provides excellent corrosion resistance in marine environments when properly maintained, while the tapered design minimizes turbulence and backpressure—critical factors for maintaining optimal engine performance and cooling water circulation in inboard installations.

These reducers are ideal for dual-exhaust setups, where you'll need one reducer per side to achieve consistent flow characteristics and balanced engine performance. Installation requires basic mechanical skills and standard hand tools; ensure the 3-bolt flanges are torqued evenly to prevent warping and exhaust leaks. The pair configuration means you're fully equipped for symmetric installations on V-6 or V-8 engines with split exhaust manifolds, eliminating the need for separate purchases and ensuring matching components throughout your system.