CRUSHPROOF Y-Assembly consists of two (2) 4' x 3" hoses, one (1) RY30 Y-Connector, and, unlike the YA300 assembly, two (2) F675 Oval Tailpipe Adapters, allowing it fit oversized tailpipes on 2010 Acura TL model vehicles. CRUSHPROOF Y-assemblies are designed for converting a single hose into two hoses for dual exhaust vehicles.