Air and Fuel› Air Cleaners, Filters, Intakes and Components
WINSTON PROD
MULTIPOCKET STORAGE BAG
SKU: W03S 6637
Easy — 1–2 hours
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | WINSTON PROD |
| Part Number | W03S 6637 |
Videos
6637 Air Filter Upgrade For My 7.3 Powerstroke - #21
How To: Install a 6637 Air Filter
We Tested The WORST 7.3 Intake! Zoodad and 6637 Dyno Testing - Legendary 7.3 Giveaway EP. 7
7.3 L diesel 6637 vs S&B air filter comparison
6637 Air Intake Mod 7.3 Powerstroke Diesel
7.3 Powerstroke Air Filter Test
Installing the RIFFRAFF Diesel 6637 Filter on our Ford 7.3 Powerstroke F250
AFE vs NAPA 6637 Air Filters
RiffRaff 6637 Filter on 7.3 Powerstroke
THESE MODS MADE MY 7.3 POWERSTROKE RUN LIKE A BRAND NEW TRUCK
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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