Holley chrome carbureted fuel pressure regulator vs Flame King 2-Stage Auto Changeover LP Regulator w/ 12in Pigtails

Overall winner: Flame King 2-Stage Auto Changeover LP Regulator w/ 12in Pigtails

Key Differences

Flame King (A) is a two-stage auto changeover LP regulator with included twin 12-inch pigtails for uninterrupted propane supply and is positioned in a lower price tier. Holley (B) is a chrome, adjustable fuel pressure regulator for carbureted systems offering 1–4 psi adjustment and a mounting bracket but has mixed feedback on pressure regulation and non-threaded mounting holes

Holley chrome carbureted fuel pressure regulator

Holley chrome carbureted fuel pressure regulator

Holley • ★ 3.7/5 • Mid-Range

Chrome fuel pressure regulator for carbureted systems with adjustable 1–4 psi and 3/8" NPT ports. Includes mounting bracket for installation. Customers note sturdy build and easy adjustment, with mixed feedback on regulation reliability

Pros

  • adjustable fuel pressure 1–4 psi
  • chrome finish
  • includes mounting bracket
  • sturdy build

Cons

  • mixed feedback on pressure regulation
  • mounting holes not threaded
  • potential leakage concerns
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Flame King 2-Stage Auto Changeover LP Regulator w/ 12in Pigtails

Flame King 2-Stage Auto Changeover LP Regulator w/ 12in Pigtails

Flame King • ★ 4.1/5 • Budget

Two-stage auto changeover propane regulator for RVs with dual tanks. Maintains gas pressure and allows tank swap without interrupting supply. Customer notes include easy installation and occasional leakage at hose connections

Pros

  • two-stage design maintains constant gas pressure
  • includes two 12-inch pigtails
  • allows removal of empty cylinder without interrupting supply
  • UL listed regulator

Cons

  • potential leakage at hose connections
  • plastic fittings can become brittle
  • mixed reviews on automatic tank switching
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Head-to-Head

CriteriaWinner
Price Flame King
Durability Holley
Versatility Flame King
User Reviews Tie