2-1/2in. Extensions 3in. flng.

The HEDMAN 2-1/2in. Extensions 3in. flng. (part number 18806) is a mandrel-bent S-curve collector reducer extension designed for custom exhaust system fabrication and modification. This dual-unit pair features a 3-inch universal-fit inlet that tapers to a 2.5-inch outlet, engineered to smoothly transition exhaust flow while minimizing turbulence and backpressure in performance exhaust applications.

Constructed from mandrel-bent steel, these extensions maintain consistent wall thickness throughout the bend radius, which is critical for exhaust flow efficiency and durability under thermal cycling. The precise S-bend geometry allows for flexible routing in tight engine compartments while accommodating header flanges and downstream components. Each extension arrives with gaskets and mounting hardware included, eliminating the need to source fasteners separately. The natural steel finish can be left raw or painted to match your exhaust system aesthetic.

This product serves fabricators, hot rodders, and exhaust system builders who need reliable transition sections for custom exhaust builds. Whether adapting aftermarket headers to factory exhaust piping, reducing diameter for sound tuning, or routing around engine bay obstacles, these HEDMAN extensions provide OEM-grade construction at competitive pricing. The 3-to-2.5-inch ratio is a common transition size in mid-sized engine builds where header collector diameter reduction is necessary before catalytic converter or muffler installation.