Cobb SRI install

18Jan09
Cobb SRI w/ Amsoil dry filter on a Mazdaspeed 3  

Cobb SRI w/ Amsoil dry filter on a Mazdaspeed 3

I finally got a Cobb Short Ram Intake after convincing my wife that the Mazdaspeed 3 “isn’t fast enough…er…could get better gas mileage with some slight modification”.  The install was very straightforward and took less than an hour.  Cobb Tuning claims that this intake adds 11 hp. and 16 lb.-ft. to the stock setup and if looking at the stock airbox wasn’t enough to prove it, their dyno testing shows the power curves before and after.  

The intake comes with an oiled filter which can get messy to clean, so I ordered a dry filter from Amsoil (part # EaAU4560) that’s made from dry nanofiber synthetic media.  In addition to being easier to clean (simply vacuum), the filter has a larger surface area allowing for more airflow through the filter.  I’ve been driving with the intake and filter installed for almost a month now and I’m very pleased with this combination.

Cobb Oiled Filter vs. Amsoil EaAU4560 (Mazda Forums)

Cobb Oiled Filter vs. Amsoil EaAU4560 (source: Mazda Forums)

Pros:

  • Performance: The car is noticeably faster
  • Price: $175 deliverd (that’s $16 per hp!!!)
  • Sound: I can now hear the stock bypass valve which sounds pretty nice
  • Gas Mileage: I’ve noticed ~2 MPG improvement
  • Filter Replacement: The Amsoil Ea filter is guaranteed for 100,000 miles or 4 years and require cleaning every 25,000 miles or once a year

Cons:

  • Increased wheel hop
  • Lose traction in 1st and 2nd gear at WOT

It’s nice having the extra power but the next step is to replace the rear engine mount with one made of stiffer material to reduce wheel hop as well as stickier tires that will grip better in 1st and 2nd.

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4 Responses to “Cobb SRI install”

  1. 1 Anna

    swit dude.

  2. 2 Jason

    Is there an install guide for this? Thanks!


  1. 1 Cobb SRI install « Mohammad Azimi | AMSOIL in Action!
  2. 2 Cobb SRI install « Mohammad Azimi | gaddish.com

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