Flowtech Reducer (Pair) - 3-Bolt 2.5" x 2.25" HASZ6CL Machined from 6061T6 Billet aluminum

Machined from 6061T6 Billet aluminum and swiveling 360° for easy connection in any position

125 in Stroke

Fits 1997-07 GM Gen III LS1 and Gen IV LS2 engines with 2004 & later two-piece thermostat (GM PN 12600172)

No pipe threads

Collector Reducer Extension

Flowtech Reducer (Pair) - 3-Bolt 2.5" x 2.25" HASZ6CL Machined from 6061T6 Billet aluminumFlowtech understands that when you purchase a set of headers, a muffler, or even an entire exhaust system, you want to know that you're getting everything you need to complete the installation. That's why we pride ourselves on our installation kits, which include all the gaskets, hardware, and fasteners necessary to hook up your headers, mufflers and or tailpipes or sidemounts in minutes. But what happens when you're doing a custom installation, or if