The Civic Si Sedan HFP package includes a wide range of performance- and style-enhancing products. High-performance springs reduce ride height by about one-inch and lower the vehicle's roll center. High-performance dampers enhance road handling characteristics and decrease body roll. Larger wheels and tires include 18x7 alloy wheels (plus 1-inch diameter) designed for high-performance 215/40ZR-18 tires (sold separately). A chrome sport muffler emphasizes performance and enhances engine sound. A full aerodynamics body kit (front, sides and rear) further elevates the style quotient of the entire vehicle. There are also HFP emblems on the exterior and interior. Price of the HFP package is $3800 plus installation.