Wolverine O-Ring Service Kits — All Engines and Valves
Wolverine O-Ring Service Kits — All Engines and Valves
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DETAILS
DETAILS
- description
O-rings are the quiet failure point in any HPA system. They are cheap, they are consumable, and when one hardens or splits you get a leak that shows up as inconsistent velocity, worse air efficiency, or an engine that will not hold pressure between shots. People spend a long time blaming regulators and nozzles for what is a two-pound piece of rubber.
Each kit here is the complete set for one engine or valve, so a service means replacing everything at once rather than hunting for the one that failed. That is the right way to do it: seals age together, and finding a second dead o-ring a week after the first wastes another bench session.
Select your platform from the dropdown. Every kit is Wolverine's own, matched to that engine's exact sizes.
Which kit do I need?
| Kit | Covers |
|---|---|
| BOLT | BOLT engine — VSR-10 and bolt-action platforms |
| BOLT M | BOLT M engine, universal fitment |
| HYDRA Gen 2 | HYDRA Gen 2. Does not include solenoid valve seals — see the MAC kit |
| HAVOC | HAVOC engine, both 8 BB and 6 BB versions. Updated in 2026 to add the 6 BB track seal |
| HAVOC Gen-12 | HAVOC HPA engine as fitted to Gen-12 shotguns |
| STORM Category 5 | STORM Cat5 regulator |
| MAC Solenoid Valves | MAC valves across INFERNO, HYDRA, BOLT, REAPER and SMP |
| REAPER Mechanical Valve | REAPER M mechanical valve |
| Evolution Series | Gen 1 INFERNO and HYDRA — the older engines still in service |
Good to know before you buy
The MAC solenoid kit is separate for a reason. The engine kits cover the engine body; solenoid valve seals are a different set. If your leak is at the valve rather than the engine, that is the kit you want — and it covers INFERNO, HYDRA, BOLT, REAPER and SMP from one part.
The HAVOC universal kit was updated in 2026 to include the additional 6 BB track o-ring, so it now covers both the 8 BB and 6 BB versions.
Worth keeping the kit for your engine in the toolbox rather than ordering when something fails. At this price it is cheaper than a lost game day.
Frequently asked questions
How do I know an o-ring has failed?
Inconsistent velocity, an engine that will not hold pressure between shots, or noticeably worse air efficiency than you remember. Leaks are often audible if you pressurise the system and listen.
Should I replace all of them or just the leaking one?
All of them. Seals age at the same rate, so replacing one usually means finding the next failure shortly after. The kits exist to do the job properly in one go.
Which kit for a Gen 1 INFERNO or HYDRA?
The Evolution Series kit. Those are the older engines and they use different sizes to the Gen 2.
My HYDRA is leaking at the solenoid, not the body.
Then you want the MAC Solenoid Valves kit. The HYDRA Gen 2 kit deliberately excludes solenoid seals.
Can you service it for me?
Yes. We are an HPA tech centre and reseal engines on the bench, including pressure testing before they go back.