The SS turbo was quick, with a 0-60MPH time of just 5.5 seconds and quarter mile of about 14 seconds. This turbocharged 2.0 liter engine with direct injection and VVT and a compression ratio of 9.2:1 has maximum boost of 20 psi (1.4 bar), delivering 260 hp (190 kW) at 5300 rpm and 260 ft⋅lb (350 N⋅m) of torque from 2500 to 5250 rpm. The new facelifted Cobalt SS 2-dr coupe launched near the end of May 2008 with the LNF version of the Ecotec engine replacing the LSJ. Other changes included the adding and removal of several exterior and interior colors. StabiliTrak stability control system was introduced. XM Radio, side-impact air bags for improved safety, and MP3 player were now standard instead of optional. At mid-year, fuel economy was improved to 25.3 mpg ‑US (9.3 L/100 km 30.4 mpg ‑imp) city, 36.2 mpg ‑US (6.50 L/100 km 43.5 mpg ‑imp) highway on the LS and 1LT, coupe and sedan models with manual transmission now labeled with XFE badging (X-tra Fuel Economy). The 2.4 engine is also now rated with slightly less power but more torque at 171 hp 6200 RPM and 167 ft⋅lb 4800 RPM. 2008: The 2.4 L naturally aspirated, high-output SS coupe and SS sedan were renamed to just "Sport Coupe" and "Sport Sedan" respectively.In addition, the 2007 model year marked the introduction of a new 32-bit computer that replaced the 16-bit unit from 2006. In addition, all models now used a 5x110 wheel bolt pattern, except the LS and LT1 which retained the 4x100 bolt pattern. Other changes include a new console, new steering wheel and new radio head unit that features an audio input jack. 2007: The 2.2 engine was retuned and now developed 148 hp (110 kW) at 5600 RPM and 152 ft⋅lb (206 N⋅m) at 4200 RPM while retaining the same fuel economy.In addition, as with most other GM vehicles that year, GM's Mark of Excellence symbol was added to both front fenders near the doors. The LS became the base model while the LT was marketed as a mid-range package the top level trim was now the LTZ. This provided performance of 0-60MPH in about 7.1 seconds and standing quarter time of 15.6s. This car was equipped with the LE5 2.4 Ecotec engine with VVT on the intake and exhaust and a 10.4:1 compression ratio developing 173 hp (129 kW) at 6200 RPM and 163 ft⋅lb (221 N⋅m) at 4800 RPM.
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