bmwe34
New member
Hi their guys i have a few quiestions regarding hp increase. I have a e34 520i and i want to increase hp firstly i had a look at the air filter box i seems to be hidden behind a light can a flex pipe from the fox light to the box help? Then i saw a as in a proformance book it had this thing called a simoa sinral you fit it to your air filter looks like a turbo will this work? Onother name for it is a cyclone? And i am having a problem with my throttle it feels like the car lacks proformance off the line
