This is an alternative to ITG, BMC or K&N.
Don't expect big hp gains, but air flow will be increased and you will see some hp and torque gains along with better throttle response.
Choose either the Pro 5 R for $75 or the Pro Dry S for $99.91
You may order it directly here:
http://www.hpashop.com/aFe-E9X-335i-...er-e9x-n54.htm