Hellfire Gears

Max-level stats (Lv60)

ATK (Lv.60)

684

Impact (Lv.60)

18%

Rank

S

W-Engine effect

Rank SStun

Passionate Construction

While off-field, the equipper's Energy Regen increases by 0.6/s. When using an EX Special Attack, the equipper's Impact is increased by 10% for 10s, stacking up to 2 times. The duration of each stack is calculated separately. *Stats shown are at Base level.

Overclock Table (★1 → ★5)

Official values straight from the publisher — every duplicate copy Overclocks the passive by one star, capped at ★5.

Upgrade	★☆☆☆☆	★★☆☆☆	★★★☆☆	★★★★☆	★★★★★
Energy Regen Increase	0.6	0.75	0.9	1.05	1.2
EX Special Attack Impact Increase	10%	12.5%	15%	17.5%	20%

Materials & Stats per Breakthrough Milestone (0 → 60)

The full ATK/sub-stat curve across all 7 milestones plus the materials each one costs, read straight from official data.

Lv.	Before	After	Material
Lv.0	ATK: - Impact: -	ATK: 46 Impact: 7.2%
Lv.10	ATK: 118 Impact: 7.2%	ATK: 159 Impact: 9.4%	Denny ×12,000 Stun Component ×4
Lv.20	ATK: 231 Impact: 9.4%	ATK: 272 Impact: 11.5%	Denny ×28,000 Reinforced Stun Component ×12
Lv.30	ATK: 344 Impact: 11.5%	ATK: 385 Impact: 13.7%	Denny ×60,000 Reinforced Stun Component ×20
Lv.40	ATK: 457 Impact: 13.7%	ATK: 498 Impact: 15.8%	Denny ×100,000 Specialized Stun Component ×10
Lv.50	ATK: 570 Impact: 15.8%	ATK: 611 Impact: 18%	Denny ×200,000 Specialized Stun Component ×20
Lv.60	ATK: - Impact: -	ATK: 684 Impact: 18%

Total materials for the full 0→60 climb

Denny ×400,000 Stun Component ×4 Reinforced Stun Component ×32 Specialized Stun Component ×30

Where To Farm

Combat Simulation — each Enemy Card costs 20 Battery, up to 5 cards per run (100 Battery for a full run).

Signature Holder

Hellfire Gears's exclusive signal W-Engine — equip it on the matching Agent to unlock the signature outfit.

Koleda Belobog

Best Agents for this W-Engine

Recommended for

Dialyn S+

Koleda A

Lighter S

Norma S+

How to Get This W-Engine

Pull it from Signal Search using Master Tapes / Encrypted Master Tapes (bought with Polychrome) — S-rank W-Engines get their own banner, usually alongside the matching character's banner.

Trade for it at the Gadget Shop's Box Galaxy section (Sixth Street): costs W-Engine Components + W-Engine Chips + Denny; Chips come from disassembling spare W-Engines.

A handful of A/B-rank W-Engines unlock through Proxy Primer trials or as story/event rewards instead of the gacha — not every W-Engine is pullable.

Compare with Same-Specialty Picks

Other Stun-specialty W-Engines, sorted by rank — solid stand-ins while you don't have the signature.

W-Engines	Rank	Base ATK (Lv.60)
Hellfire Gears	S	684
Chief Sidekick	S	713
Neon Fantasies	S	713
Yesterday Calls	S	713
Roaring Fur-nace	S	713
Spectral Gaze	S	713
Ice-Jade Teapot	S	713

Official Artwork / Lore

This W-Engine is renowned for its ultra power. Modified by Koleda, its energy level has almost exceeded the safety limit. Although this W-Engine is entirely designed for damage output, and the Speedup and Blaze functions have been merged into one, this is precisely what Koleda wanted. "I've got a clear shot at your shins, you know? So you'd better think twice before saying I'm short, got it?" — Koleda, warning a rude business partner

Alternatives of the same specialty

Stun specialty — decent picks while you don't have this one

Chief Sidekick

Neon Fantasies

Yesterday Calls

Roaring Fur-nace

Spectral Gaze

How to read this W-Engine page

Every W-Engine has 5 Refinement ranks (R1→R5): refinement ONLY strengthens the passive effect — the numbers in the table above run from left (R1, unrefined) to right (R5, max refinement via 4 duplicates or Overclock materials); Base ATK and the Advanced Stat (CRIT Rate/CRIT DMG/ATK%/PEN Ratio/Anomaly Proficiency...) do NOT change with refinement, only with the engine's level. "Best Agents for this W-Engine" prioritizes agents whose real build actually recommends this engine; if that data isn't available yet, the page falls back to agents sharing the same specialty as a rough guide. "Alternatives of the same specialty" lists other W-Engines with the same role — useful when you don't own the engine shown on this page.

FAQ

What is Hellfire Gears in Zenless Zone Zero?

Hellfire Gears is a rank S W-Engine built for the Stun specialty in Zenless Zone Zero — equip it on an Agent of the matching specialty to unlock the full passive effect; see the base stats and the full R1→R5 Refinement table in the sections above.

Which Agents should use Hellfire Gears?

Hellfire Gears fits Stun specialty Agents best, with 5 recommended characters including Koleda, Lighter, Pulchra — see the full list with portraits in the "Best Agents for this W-Engine" section above.

How much Denny and material does it take to upgrade Hellfire Gears, and where do I farm it?

Leveling Hellfire Gears through every milestone takes roughly 4 W-Engine components and Denny ×400,000, Stun Component ×4, Reinforced Stun Component ×32 Denny combined — the components drop from Combat Simulation; see the exact breakdown per milestone and the Battery cost in the "How Much You Need" and "Where to Farm" sections above.

Is Overclocking Hellfire Gears worth it?

Overclocking only strengthens Hellfire Gears's passive effect from ★1 up to ★5 (5 copies) — it never changes Base ATK or the sub-stat, so getting the base copy matters far more; treat extra copies as a bonus.

Where do I get Hellfire Gears?

Mostly through Signal Search gacha (Polychrome); a few A/B-rank W-Engines are tradeable at the Gadget Shop's Box Galaxy or come from story/event rewards — see the "How to Get" section above for details.