Performance enhancing products for M3 enthusiasts.

Rongineer airbox kit installed on an M3

BMW E30 M3 Airbox Kit

An economical solution to improving performance by optimizing the air path to the engine when replacing the original restrictive airflow meter.

Read about the M3 Airbox in BMWCar and Straight Six Magazine.

Rongineer Electric Fan Kit installed on a M3

BMW E30 M3 Fan Kit

Release power by eliminating the engine driven fan.

Fan switch installed on a M3

BMW E30 M3 Fan Switch Kit

A Manual override switch for the E30 M3 Electric Fan Kit.

Rongineer M3 Rear Body Brace

BMW E30 M3/325 Rear Body Brace

More than a strut brace, improve your suspension performance by stiffening the rear body.

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