Airflow: Paper vs Foam, K&N

#1

http://www.bolhuijo.com/airflowtest/index.html

Pretty interesting test of an E30 airbox and AFM with different filters. Basically proves that OEM is king… another thing to chew on: cone filters have even less surface area.

#2

This is great, Dan. Add cone filters, CAI, and chips to the list of B.S. performance "upgrades." Why do people buy BMWs? For the German engineering. So why in the hell do they think they are better engineers than the Germans? Those guys aren’t stupid–selling cars is a tough HP war and they’re not going to leave easy gains on the table.

Sasha