The BMW E21 was produced from June 1975 to December 1983 and is the first generation of the BMW 3 Series, replacing the BMW 2002 Series. The BMW 3 series was exclusively built in a two-door sedan body style, except for convertibles made by Baur, which was a German Coachbuilder building BMW convertibles since the 1930s.

This 1981 BMW 323i Baur was originally equipped with a 2.3L M20 fuel-injected six-cylinder engine, which has been replaced by a BMW M3 3.2L S52, ZF 5-speed Manual transmission, twin disc clutch, and a BMW Medium Case (188mm) limited slip differential out of a donor E36 BMW M3. The engine has been rebuilt with a custom set of forged pistons, lowering the compression ratio from 10.5:1 down to 9.0:1 for a custom turbocharged set-up. The original output of the 3.2L S52 was estimated at 240hp at 6,000 rpm. This custom-built turbocharged 3.2L S52 engine is estimated to produce 450hp at 6,000rpm.

To help keep the power planted to the ground, a custom front and rear coil-over suspension has been built, along with a custom Brembo front and rear braking system to help bring this turbocharged vehicle to a stop. The body has been modified with flared fenders to make room for the custom set of BBS wheels and Michelin tires. The interior will also be customized in the near future (TBD)