Upgrade your 8th Gen Civic Si with the PLM Private Label Mfg. K-Series Header, specifically designed for K24 and K20 engines. This Version 2 (V2) header features a true step-up exhaust design, optimizing exhaust flow for maximum performance gains. The one-piece construction ensures a 100% leak-free installation, providing reliability and durability. Perfect for enthusiasts seeking enhanced power and efficiency, this header is the ultimate choice for your Civic Si.