The Ultimate E90 Brake Booster in the BMW E30 DIY Guide
Everything you need to know to run the best Brake Booster solution for E30s, especially for 24-valve 6-cylinder engine swaps. There are many reasons the E90 Brake Booster belongs in an E30, for the same reason a 24-valve BMW straight six belongs in them. The E9X booster is compact, powerful, abundant and affordable. Because the E9X is a much larger and heavier vehicle...
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