BMWGuy
NAXJA Forum User
- Location
- Columbus, OH
Borrowed heavily from others. Spectre makes the hose and the fittings (about $30 total). I used a rotary cutting bit and my Dremel tool to remove the material in the cowl and air box then cleaned it up with a stone bit. Self-tapping sheet metal screws for the cowl fitting and 1/4 x 1/2 nuts and bolts for the airbox. Used a spare plastic body putty spreader to cover the orig. airbox opening. Black RTV everywhere. Black spray paint on the front of the airbox inside and out. Butt dyno says 20hp increase. Laws of physics say zero. I expected a howl from the cowl but maybe my radio's too loud!