danST Engineering are pleased to offer this high quality velocity stack kit for the BMW S38 M5 throttle bodies (S38 engine). The kit consists of the following:

4x Flange fitment 50mm Diameter CNC machined billet Aluminium trumpets

8 x M6 Button Head Screws & Washers

Fastener holes are on 70mm centre distance as per the standard throttle body fitment.

These velocity stacks are CNC machined from billet aluminium before being polished to a show standard finish. You will not find a better quality velocity stack anywhere for this type of engine. 

Velocity stacks serve to increase induction length and thus torque/power as well as amplifying the individual throttle body sound!