I run a 14X5 K&N on mine. Maybe over kill, but not if you don't clean it very often! LOL But I think that more important than size would be cold air intake set-up. The worst thing you can do is pull in hot air from your engine bay.
www.ramairbox.com
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Specializing in Custom L.E.D. inserts.
http://www.ccled.com/
Contact me @ blazer2wd1972@hotmail.com
(406)675-8082
or Joel @ jmcwaters@eps-corp.net
1972 2wd Blazer, 350/700R4/3:73 posi, err & Custom L.E.D. inserts! LOL
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