Buy NAPA Gold Air Filter - FIL 6637 online from NAPA Auto Parts Stores. Get deals on automotive parts, truck parts and more.

2013年12月17日 · Bottom line up front: I no longer endorse the Napa 6637 air filter anymore and advise against it! This morning I am gearing up for a cross-country hauling trip and did the …

2012年4月5日 · I ran the Tymar/6637 filter for a few intervals and finally switched to the AFE Bigboost filter and Made a night and day difference in performance. The 6637 is a great filter …

26 replacement air filters for NAPA 6637. See cross reference chart for NAPA 6637 and more than 300.000 other air filters.

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did the napa 6637 air filter mod on my 2000 f350 that i bought a few months ago.....it makes a pretty good air swishing sound under medium to heavy...

This WIX and NapaGold air filter is a premium engine filter designed to remove contaminants from oil, air, gas or diesel fuel ensuring superior engine protection and optimal filtration efficiency for …

2012年4月9日 · i've ran s&b and 6637. you know bean likes to tell the story about one time they had a 400 horse truck on the dyno with a nasty 6637, had like 60k + on it, damn thing was …