Well, it is just ordinary everyday limited edition car

2500+ made in 1994 to homologate 4 door sedan with 16 valve inline 4 to FIA Class II / Supertouring rules. BMW had raced with 318is Coupe until that but 2 door bodies were outlawed for 1994 season and BMW did not have 16 valve inline 4 sedan available so they had to make a homologaton special. No idea why they did not use 320i sedan, maybe inline 6 cylinder vas too heavy?
Few years back BMW produced E90 320si for same purposes for WTCC series. Normal engines had valvetronic throttle system but it was not suitable for racing so they had to make 2500 cars with special engine

Basically 318is Class II is ordinary sedan but with M42 engine that was previously available only in 318is Coupe in europe, US 318i sedans had M42 all along I think? It also has better suspension (Bilsteins front and rear, normally Boge). Engine is ordinary M42, no extra power. Some BMW magazines have said that these cars are lightened but that is false, they are actually bit heavier than stock cars because of rear wing and front splitter. Oh, and cloth seats had special colour pattern

Most notable difference is the rear wing and front air dam and splitter. They are pretty much the same as in M3 GT produced in the same time. Class II cars came from factory with the splitter hidden under the nose and rear wing spacers put inside trunk. They are functional pieces and really affect the car's handling on high speeds, atleast in race conditions.
That's about it, really
