air filter - Si vs. EX?

Phun Siz · 05-13-2006, 12:54 PM

Will the Si filter fit an EX? It it the same filter used in both or is everything different between the two?
Thanks.

skittleslegend · 05-13-2006, 01:06 PM

If you're talking about the K&N drop in, the R18 has it's own filter. It actually came out first.

Just as an FYI, one isn't necessarily better than the other if they come from the same company. The difference is in how efficient the air intake system (including the filter) is. If it's less efficient from the factory, you'll typically see larger gains than on one that has been optimized from factory specs, like the Si's. By efficiency, I'm measuring based on hp unleashing of course.

galaxycivic · 05-13-2006, 01:08 PM

Quote:

Originally Posted by Phun Siz

Will the Si filter fit an EX? It it the same filter used in both or is everything different between the two?
Thanks.

K&N's web site has two different part numbers for the DX/LX/EX and the SI. The SI's filter is a little longer and does not have the angled corner

DX/LX/EX Filter

SI Filter

Phun Siz · 05-13-2006, 05:16 PM

I'm hoping Amsoil comes out with a drop-in soon. I know the Ford filter fits the Si. I was hoping the same one might fit the EX.

The last K&N air filter I had scared me. I've seen screen doors with more filtration potential (opinion, obviously). Trying to decide if a CAI is worth the extra bucks.
Thanks guys.

05-13-2006, 12:54 PM	#1 (permalink)
Phun Siz Member Join Date: Sep 2005 Location: Los Angeles, CA Posts: 35	air filter - Si vs. EX? Will the Si filter fit an EX? It it the same filter used in both or is everything different between the two? Thanks.
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05-13-2006, 01:06 PM	#2 (permalink)
skittleslegend Senior Member Member Join Date: Sep 2005 Location: Stowe, Vermont Age: 27 Posts: 7,824	If you're talking about the K&N drop in, the R18 has it's own filter. It actually came out first. Just as an FYI, one isn't necessarily better than the other if they come from the same company. The difference is in how efficient the air intake system (including the filter) is. If it's less efficient from the factory, you'll typically see larger gains than on one that has been optimized from factory specs, like the Si's. By efficiency, I'm measuring based on hp unleashing of course.

05-13-2006, 05:16 PM	#4 (permalink)
Phun Siz Member Join Date: Sep 2005 Location: Los Angeles, CA Posts: 35	I'm hoping Amsoil comes out with a drop-in soon. I know the Ford filter fits the Si. I was hoping the same one might fit the EX. The last K&N air filter I had scared me. I've seen screen doors with more filtration potential (opinion, obviously). Trying to decide if a CAI is worth the extra bucks. Thanks guys.

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