BMW releases power kits for the 135i and 335i models

BMW 135i and 335i models can now be retrofitted with two new performance power kits for more muscle and speed.

The Version 1 kit has new engine software to optimize performance, while Version 2 tacks on an auxiliary water cooler and radiator fan to keep the engine from getting feverish during extreme driving.

With either kit, horsepower increases by 20 hp, to 320 hp, on both models, and torque jumps to 332 lb-ft for models equipped with automatic transmission. With the manual or DCT transmission, torque measures 317 lb-ft.

A performance kit improves acceleration from 0-to-60-mph by 0.2 second on the standard 335i, and by 0.5 second when accelerating from 50 mph to 75 mph.

Both kits are available for 135i and 335i models. The Version 1 kit can also be fitted for X6 vehicles produced through April 2010.

All of the aforementioned vehicles keep the same emissions and fuel-efficiency ratings when using the power kits.

BMW is offering an introductory price on all power kits through the end of the year: Version 1 costs $599 (including kits for X6 models), and Version 2 costs $1,199. Neither price includes the installation fee.

By Michelle Koueiter