While E30 models are known to be robust, the M3’s solid lifters demand periodic valve adjustments.market cars use a wide-ratio box with a conventional shifter pattern. European models with the close-ratio five-speed gearbox have a “dog leg” shifter with first gear located down and to the left.European models are now old enough to be imported into the United States under rules that allow cars more the 25 years old to come in, but some states (like California) require emission compliance to register the car.Outside the United States, the S14 engine grew to 2.5-liters for the special-edition 'Sport Evolution' models (built from the 1989 model year on), with output rising to 235 horsepower for the final incarnation of the M3, known as the 'Sport Evolution 2.' models was 192 horsepower, so this M3’s 6.9-second time to 60 is unlikely to win many modern drag races, and it isn’t much quicker than a contemporary 325i. The M3's high-revving 2.3-liter four-cylinder S14 engine used a block similar to a four-cylinder 3-Series, but the M3 received its own dual-overhead-cam, 16-valve cylinder head. Inside, it's mostly standard E30 trim, with some special, race-oriented touches like a gauge cluster that displays oil pressure (instead of mpg), a steering wheel with BMW M-stripe accents, and unique patterns adorning M3s with cloth seats, among other small changes. So much had to be changed for the M3 that the only exterior body panels it shares with the regular 3-Series were the hood and the roof. Even the M3's rear-window angle was altered (compared to your standard E30) to help manage airflow. The M3 wears flared fenders to cover wider tires, its nose has a lower air dam and its tail is higher to improve aerodynamics. Built for competition, the E30 M3 sports a number of changes when compared to standard E30 coupe.

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