My $20 custom airbox
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Junior Member
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Joined: Oct 2007
Posts: 447
Total Cats: 17
From: Suffolk, VA
I am in the process of installing my MP62 coldside SC. I figured I would post a few pictures of my $20 custom airbox mod.
I used corregated plastic and 0.5 x 0.5 aluminum angle. The filter is a 7" round x 4" deep K&N that has an offset hole.
The area marked with an "X" in the 1st picture will be cut out of the firewall. I just haven't done it yet.
I should be pulling 99% of my intake air from the high pressure cowl.
Here are some pictures...






I used corregated plastic and 0.5 x 0.5 aluminum angle. The filter is a 7" round x 4" deep K&N that has an offset hole.
The area marked with an "X" in the 1st picture will be cut out of the firewall. I just haven't done it yet.
I should be pulling 99% of my intake air from the high pressure cowl.
Here are some pictures...






Wow, that's perfect - and easy for the blower. Though I think that's the wrong filter for the box. You need something that keeps that hole open - like a domed foam filter or smaller gauze. I just wouldn't want the filter covering the hole, or you're going to only use about 20% of the filter which will be restrictive (not to mention get dirty quick).
Thread Starter
Junior Member
iTrader: (2)
Joined: Oct 2007
Posts: 447
Total Cats: 17
From: Suffolk, VA
The hole in the box is oblonged to compensate for engine rock. I hope its enough. I am running stiffer mounts so hopefully it will be enough clearance. If not, I have a razor knife and I'm not scared to use it.
Cupcar,
I will re-evalute the filter situation once I get the car together and running. The hole in the firewall is above the filter, so I don't think I will have an issue. Only time will tell.
Cupcar,
I will re-evalute the filter situation once I get the car together and running. The hole in the firewall is above the filter, so I don't think I will have an issue. Only time will tell.
after you cut that hole through the firewall, be sure to post pics on miata.net under "check out what I did to my sunburst" 
They'll trip.

They'll trip.
I did something similar to my first Sunburst, only on the other side of the engine....and yes there were a number of people that thought I was mad. Hasn't stopped me from thinking of doing it again for my DIY setup with my current sunburst, and there is only 55 of that model down under.
J
I cut Tom's BRG headlight lid without even thinking. I believe a few people commented about it, then i thought how ******* lame, it's a miata, regardless of the color/trim. a starburst yellow isn't going to drop any panties, therefore, it's ok to cut up and abuse.







^