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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N20, N26, B46, B48 Turbo Engine / Drivetrain / Exhaust Modifications > Review: HP Autowerks Performance Air Filter
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      06-13-2012, 04:29 AM   #1
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Drives: 2012 BMW 328i, 2008 BMW 135i
Join Date: Feb 2012
Location: Baldwin Park, CA

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Review: HP Autowerks Performance Air Filter

Harold@HPA sent us their drop in filter awhile ago for us to try out. Was going to write up a review awhile ago but just been swamped lately with N20 parts development.

Quality of the part is top notch.

Foam filter element. I like foam filters. Should see good flow through this.
Top View:

Bottom View:

Installation was a breeze. All you need is a flat head screwdriver and 5 minutes you're done.

As for performance, there is an improvement. Car feels smoother through the RPM band. Throttle response seems a tad crispier. My butt dyno says there's a tad bit more torque with the panel filter. You can also slightly hear the factory diverter valve if you're into that kind of stuff.

I think a great upgrade from the factory paper panel. Great choice if you want to keep the factory intake box and not have a cone filter. 2 thumbs up!

Last edited by Fred@ER; 06-13-2012 at 08:37 PM..
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