Air System
Best Air Dryers for Class 8 Trucks (2026)
Quick answer
For most Class 8 fleets, a quality AD-9 style air dryer assembly or OEM spin-on cartridge replaced every 12 months (or 100k miles) keeps moisture out of the brake system. Our top picks balance catalog availability, price, and common Bendix/Wabco cross-reference coverage.
Our top picks
Comparison
| 5008414PGBXW - AIR DRYER CARTRIDGE, PURAGUARD | 800202 - AIR DRYER | K092871PG - AIR DRYER | |
|---|---|---|---|
| Live price | $345.62 | $1010.61 | $1577.18 |
| SKU | 5008414PGBXW | 800202 | K092871PG |
| Type | Spin-on cartridge | Complete dryer assembly | Complete dryer assembly |
| Best for | PM cartridge swap | Mid-range rebuild | Full assembly replacement |
| Typical PM interval | 12 mo / 100k mi | As needed | As needed |
Our data
This guide uses live prices from the PartsNow catalog (~16,900 SKUs). Prices shown reflect current sell pricing with standard markup. We rank by fleet relevance, catalog availability, and common Class 8 replacement patterns — always confirm exact fitment with your part number before ordering.