Join Date: Jul 2003
Location: Smokin melb's eastern suburbs
Run the largest diameter you can and the xtreme filter lid.
A 10x5 has the same (approx) filter area as an 11x4 or a 12x3, etc... so if you can fit one, go for a 12x5 with an xtreme filter lid and you should be set.
Me, i run k&n 14x4 with the xtreme lid. Cost $130 for the filter because I had to have it brought in for me, but they gave me the lid for $170. I ordered directly from rocket industries.
Just like a Tsunami.