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 usual check and while doing the under-hood check I noticed that the hose clamp for the air …

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 and is hard to beat for price but I noticed more boost, better low end boost and a hair better on mileage as well by going to the Afe on my Tymar setup.

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

Find many great new & used options and get the best deals for NAPA Gold Air Filter - Industrial 6637 at the best online prices at eBay! Free shipping for many products!

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 your car, truck, tractor, heavy-duty, gas engine or diesel engine.

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 black it was so dirty. they dynoed it with the filter on and then took the damn thing off and it made the exact same hp so don't give me that crap about oh it flows yada yada ...