The valve sits at the end of the secondary intake pipe. Removing it still leaves the intake pipe in place. I did this last weekend on my 55 plate 182, at the same time as fitting a K&N panel filter. The noise difference is bearly noticable, the performance difference is only slight. It certainly doesn't sound anything remotely "like a beast" as the title inferred. If its noise you want just slap on a 57i but be prepared for a slight loss in power.