Fitment Information Honda Civic Coupe (2016, 2017, 2018, 2019, 2020)  Honda Civic Sedan (2016, 2017, 2018, 2019, 2020, 2021)  Honda Civic Hatchback (2017, 2018, 2019, 2020, 2021)  Honda Civic Si Coupe /  Sedan (2017, 2018, 2019, 2020)  Note Compatible with MT, CVT, includes a recirculation tube. Not compatible with the after 2020 model. Emissions Compliance This Blow Off Valve currently does not have a CARB EO # and is not legal for sale in California or Other CARB States. Specs & Features High-Quality Aluminum Die-Cast Body Made of durable silver-coated aluminum die-cast material. Ensures both a sleek appearance and long-lasting performance under the hood. High Stiffness Metal Die-Cast Valve The main portion of the secondary valve is crafted from metal die-cast material. Offers reliable operation while enhancing the overall aesthetic appeal. Triple Fin Design for "Super Sound" Features a triple fin design located at the center of the funnel. Produces a dynamic and aggressive sound, adding excitement to your driving experience. Optional special Round Fin available for customized sound tuning. Valve Features: Pull-Type Relief Valve Operation Provides precise relief of excess boost pressure. Compatible with a wide range of boost pressures, offering versatility compared to push-type blow-off valves. Primary Valve (Small) Instantly opens when the throttle is lifted, rapidly releasing initial excess boost pressure. Secondary Valve (Large) Works in conjunction with the Primary Valve in a sequential dual valve structure. Ensures optimal blow-off operation across various boost ranges without any risk of leakage. Product Description HKS's Super SQV (Sequential Blow Off Valve) features a special sequential valve setup and a pressure control system, enabling it to work effectively across various boost levels, from low to high. With its Pull-Type relief design, it maintains stable performance no matter the boost pressure. Ideal for modern turbocharged vehicles, the Super SQV promises reliable support for newer generations. Redline360 sells only genuine and authentic HKS products.