ARP Main Studs offer the following benefits:

10-micron Microglass replaceable element

45mm Intake / 13

OEM US headers will also work well if the car does not see extensive track use

Total height is 4

Samsonas Sequential Gearbox, BMW E46 M3 Package:6-Speed Gearbox ARP Main Studs offer theThe Samsonas 4 5 6 (+ reverse) full Sequential Gearbox for BMW E46 M3 models equipped with BMW S54 Engine includes Samsonas Motorsport Sequential Gearbox, ACAL RSS Gear Position Sensor, Output Flange, Bellhousing Adapter, and Input Shaft. Bell housing optional. This sequential transmission boasts Samsonas' X300 clutch shaft, 400 ratio configuration options, quick change top gear, and (5) engagement dogs for maximum fast gear change. With straight cut