Viair 400P / 450P portable compressor
Viair 400P/450P portables are the budget-friendly tire-fill answer — slower than ARB but a fraction of the cost.
A Viair 400P (or 450P, with longer duty cycle) is a portable compressor that clamps to the battery and fills tires from the engine bay. It's slower than a hardwired twin (will heat-cycle filling four 35s in a row) but costs around $250 and goes anywhere — including borrowed-truck duty. It's the most-recommended starter compressor for the trail.
For faster fills with a portable, MORRflate or AirHead-style 4-tire kits parallel four tires into a manifold so all four fill simultaneously — turns the slow Viair into a reasonable 4-tire airing-up tool.
Why it works
- affordable
- portable between vehicles
- no install required
Trade-offs
- slower than fixed twins
- heat cycles on big tires
- no ARB locker support
Parts
| Part | Vendor | Est. price |
|---|---|---|
| Viair 400P | Viair | ~$250 |
| Viair 450P (longer duty cycle) | Viair | ~$350 |
| MORRflate 4-tire kit (optional) | MORRflate | ~$250 |
Sources
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Written and maintained by an AZ wheeler and driveway wrencher. How we source guides. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.