325i Brake Assembly The simplest solution, which also passes all inspections, is to use the factory e30 brakes. This system uses ventilated front discs and non-ventilated rear discs. This system is very reliable, and practical for everyday driving. However, frequently pushing the limits of the car and the brakes in spirited on-road driving or track applications, will cause the brakes to fade rather quickly. e30 M3 Brake Assembly Those seeking a more aggressive brake system may want to use that of the e30 M3. Converting to such a system will require the complete front strut assembly to be converted. Also the rear brakes and suspension of the M3 will need to be used. Note: This will also change the bolt pattern of the 335i to 5x120. This pattern will allow the use of a wider variety of wheels, such as the classic 16" Alpina rims. Others are also available; from factory (e28, e24 or even the 17" of the e34), or a wide variety of aftermarket rims. Alpina Brake Assembly If the four lug pattern (4x100 et25) is to remain, the Alpina brake assembly may be used as a substitute. This consists of large diameter discs and larger calipers being installed in the front. After such a conversion 16", or larger, rims will be required for clearance reasons.
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