http://www.leftlanenews.com/2006/09/01/ ... -unveiled/
..the Civic Si Sedan serves as another performance halo for the Civic line-up with a 197-horsepower, 16-valve, DOHC 2.0 liter i-VTEC 4-cylinder engine with an 8,000 rpm redline - all mated to a close-ratio, 6-speed manual transmission and a helical-type, limited slip differential. Vehicle Stability Assist (VSA) with Traction Control is standard (and also added to the Civic Si Coupe as standard equipment for 2007).