The Ferrea Single Valve Spring Kit for the Nissan TB48 (Part #KT4056) includes 24 high-performance valve springs designed for high RPM and boost applications.

The Ferrea Dual Valve Spring Kit for the Nissan TB48 (Part #S10114) includes 24 high-performance dual valve springs designed for turbocharged applications, offering enhanced valve control and durability.

​The Ferrea Valve Lock TB48, Set of 24 features 6mm radial groove steel locks engineered for the Nissan TB48DE engine, ensuring precise fitment and durability in high-performance applications.

Ferrea Valve Lock for Toyota 1GR-FE, set of 24, ensures secure valve spring retention

Ferrea Valve Locks are manufactured from high quality 4140 chromoly bar stock and machined to exact tolerances.The locks are heat-treated for maximum strength and finished with the black oxide for an attractive appearance.

The Ferrea Titanium Retainer TB48 Single (Set of 24) provides lightweight, high-strength retainers for single valve spring setups in Nissan TB48 engines.

​The Ferrea Titanium Retainer TB48 Dual (Set of 24) offers lightweight, high-strength retainers designed for dual valve spring setups in Nissan TB48 engines, enhancing valvetrain stability in high-performance applications.

Ferrea E12001 Titanium Retainer Set for LS1/LS7, set of 16, 7° profile

Ferrea E12001 Titanium Retainer Set for LS1, set of 16, 7° profile

The Ferrea E12002 Titanium Retainer Set for Chevrolet L92 engines (16 pieces) is designed for dual spring applications with a 7° CNC profile

Ferrea E12014 Titanium Retainer Set for LS1/LT1, set of 16, 7° Pro CNC profile, approx

Ferrea Titanium Retainer for Toyota 1GR-FE Single, set of 24, aerospace-grade titanium, 7° Pro CNC profile, 40% lighter than steel.

Ferrea Titanium Retainer for Toyota 1GR-FE Dual, set of 24, aerospace-grade titanium, 7° Pro CNC profile, 40% lighter than steel, for high RPM reliability.

Precision CNC-machined from aerospace quality titanium, these Pro Retainers are fully heat-treated and finished to exact tolerances, adding strength while offering a 40% weight reduction over conventional steel retainers

The Ferrea Single Valve Spring TB48 (Set of 24) delivers high-performance valve control for Nissan TB48 engines, ideal for high-RPM applications.

Ferrea Single Valve Spring Kit for Toyota 2JZ-GTE, set of 24, PAC alloy, designed for high-performance applications up to 1,200 whp, requires separate titanium retainers.

Ferrea Single Valve Spring for Toyota 1GR-FE, set of 24, PAC alloy, optimized for high RPM stability and performance

The Ferrea Single Valve Spring for the 1FZFE engine is available as a set of 24, engineered for reliable performance and enhanced engine efficiency.

Ferrea Single Beehive Valve Spring for LS1/LT1, set of 16, 130/318 lbs, 0.600" max lift,

Ferrea Single Beehive Valve Spring for LS1/LT1, set of 16, 130/318 lbs, 0.600" max lift