What is the best air filter for a CRF 150?

What air filter on the market provides the best air flow and dirt particle stoppage for a CRF 150? Thanks

either UNI or Twin-Air foam filters

We just put no toil on our 150 and 230 last night, my son says of his 150 that he didnt know an air filter could make that much difference. ( I knew)

way more responsive. The only brand we have tried but it works great on both our bikes at least on the first ride.

I put a UNI on over the winter, and I really like it so far. Seems to have noticably better response than stock.

do you think the uni and twin air filters are as good as the BBR free flow air filter?

UNI and Twin Air seem to be the most popular around here.

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