Reyn Speed Shop E31 858 Build Breakdown Drivetrain & Transmission: CarBahn Motorsports 5.8L Stroked S85 V10 Eventuri Carbon Fiber Intake System Stock E60 M5 Exhaust System With Customizations to Fit…Reyn Speed Shop E31 858 Build Breakdown Drivetrain & Transmission: CarBahn Motorsports 5.8L Stroked S85 V10 Eventuri Carbon Fiber Intake System Stock E60 M5 Exhaust System With Customizations to Fit…Reyn Speed Shop E31 858 Build Breakdown Drivetrain & Transmission: CarBahn Motorsports 5.8L Stroked S85 V10 Eventuri Carbon Fiber Intake System Stock E60 M5 Exhaust System With Customizations to Fit…