BMW Offers Performance Power Kit Add-Ons for 135i, 335i and X6 by Dean Hightower
BMW is offering performance engine tuning kits for the twin-turbo six-cylinder BMW 135i, 335i and X6. These engine tuning kits give the 335i, 135i and X6 an extra 20-hp over the 300 the cars come with stock according to BMW, bringing the 335i's horsepower in line with the 335is. Since there is no [...] .. Read More!