The range of Cast Downpipes is designed to enhance gas-flow and heat management, increasing efficiency and performance. The HJS High-Flow Sports Catalyst is a high-quality aftermarket catalyst, engineered to reduce the density of OEM catalysts while maintaining emission regulations for daily use. Standard OEM catalysts typically have 500-600 cells, while the high flow catalyst reduces this to 200 cells. This results in a freer-flowing catalyst, improving gas-flow and performance. - Enhances gas-flow and heat management - HJS High-Flow Sports Catalyst reduces cell density to 200 cells - Maintains emission regulations for daily usage - Improves overall performance Specifications: - Pipe Diameter: 70.00 - Installation Time: 2.5 to 3.5 hours (including removing OE system) - Race Product: Yes - EMarked: No Kit comes with: - MSVW491: Cast Downpipe with 200CPSI Hi Flow Sports Cat - MSVW491 - MSVW492: Resonated OPF/GPF Bypass - MSVW492 - F5152: Adapter to OE OPF Back 70 I.D. to 65 I.D. 90 long Vehicle Compatibility: - Volkswagen Polo GTI 2.0 TSI (AW 5 Door PRE Facelift Models only) - GPF/OPF Models Only 2019-2021