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2008 Civic Si Sedans
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197-hp, 2.0-Liter, DOHC i-VTEC® 4-Cylinder Engine
The 2.0-liter, dual-overhead camshaft K20Z3 engine in the Civic Si Sedan produces 197 horsepower at 7800 rpm and 139 lb-ft of torque at 6100 rpm. Thanks to special Honda-developed performance technologies, such as the ultra-precise Drive-by-Wire™ throttle system, 3-rocker i-VTEC® variable valve timing, a cold-air intake and high-flow, low-heat exhaust manifold, the K20Z3 engine boasts an impressive flat torque curve from idle, all the way to its race car-like 8000-rpm redline. Plus, the K20Z3's intake and exhaust system is quieter and less obtrusive when cruising at highway speed, but produces an aggressive, sporty sound at full throttle.
Helical Limited-Slip Differential
Usually found only on high-performance and racing cars, the limited-slip unit helps give the driver more steering control and enhanced steering response when accelerating and cornering.
Close-Ratio 6-Speed Manual Transmission
The performance-oriented close-ratio 6-speed transmission is lightweight and compact, with a quick, precise shift action and solid, direct feel. Special features of this transmission include close gear ratios for first through fifth gears and a low 4.765:1 final drive, for faster acceleration, a stiffer cast-aluminum transmission case for reduced noise, carbon-faced single cone synchronizers on fifth and sixth gears for enhanced shift feel and a low-ratio sixth gear for quieter, more fuel-efficient* highway cruising.

*EPA estimated 21 city/29 hwy mpg for 6-speed models with manual transmission. Based on 2008 EPA mileage estimates, reflecting new EPA methods. Use for comparison purposes only. Do not compare to models before 2008. Actual mileage will vary.
MacPherson Strut Front/Multi-Link Rear Suspension
The geometry of the Civic’s MacPherson strut, and multi-link rear suspension improves responsiveness and feedback.
Drive-by-Wire™ Throttle System
Fast-responding electronics take the place of a traditional throttle cable and produce greater response, fuel economy* and driveablility with minimum adjustment and maintenance.

*EPA estimated 21 city/29 hwy mpg for 6-speed models with manual transmission. Based on 2008 EPA mileage estimates, reflecting new EPA methods. Use for comparison purposes only. Do not compare to models before 2008. Actual mileage will vary.
Anti-Lock Braking System (ABS) with Electronic Brake Distribution (EBD)
The anti-lock braking system (ABS) helps you maintain steering control during hard stops. Electronic Brake Distribution (EBD) balances braking forces at each wheel according to how the car is loaded dynamically.