Designed to maximize the performance of your 10th-generation Civic’s 1.5L turbo engine, this downpipe & front pipe combo features a precision-mandrel-bent 3.0″ front pipe and downpipe constructed from 18-gauge 304 stainless steel, complete with CNC-machined 3/8″ thick flanges and bungs for the factory O2 sensors. It’s a direct bolt-on kit for 2016-2021 Civic Si and non-Si models, supporting your factory cat-back exhaust and retaining compatibility with OEM heat shields. Backed by PLM’s one-year warranty and engineered by enthusiasts for enthusiasts, it’s the best-value upgrade for improved exhaust flow and enhanced engine response.