For those of you looking for heavy duty brake lines, we offer these steel braided brake lines from Troutman. It's also recommended you upgrade to steel braided brake lines when you use performance brakes and components.
Brake Line Set (Steel Braided) DOT-approved, 325iX (1988-90) Brand: Troutman [More Info]
Brake Line Set (Steel Braided) DOT-approved, 325/e/es/i/is/iC (1984-92), M3 (1987-91) Brand: Troutman [More Info]
Brake Fluid Hose, Reservoir to Brake Master Cylinder (Blue) (Sold by the meter), BMW E30 3 Series, All (1984-92) Brand: Contitech [More Info]