GSC Power Division RET5041-16 4G63 HP Beehive Titanium Retainers Set of 16

Vehicle Fitment

• 1992-2006 Mitsubishi Lancer Evolution I-IX, 4G63T
• 1990-1999 Mitsubishi Eclipse GST / GSX, 4G63T
• 1990-1998 Eagle Talon TSi, 4G63T
• 1990-1994 Plymouth Laser RS Turbo, 4G63T
• 1991-1992 Mitsubishi Galant VR4, 4G63T

Fitment Notes

• Designed for use with beehive-style valve springs - specifically compatible with the GSC Power Division 4G63 HP beehive valve springs (sold separately as part of kit 5041 or as standalone springs)
• Not compatible with standard dual-wound or conventional round-wire valve springs - beehive springs require the smaller diameter retainer included in this set
• Verify valve stem diameter and keeper groove specification on your specific 4G63 head before installing; confirm compatibility with your cam lift before ordering
• Maximum supported cam lift: 12.1mm net valve lift (limited by seal-to-bottom-retainer contact)

Features

• CNC-machined titanium construction - significantly lighter than steel retainers, reducing valvetrain reciprocating mass for higher RPM capability and improved valve control
• Designed specifically for the GSC HP beehive valve spring profile - smaller retainer OD matches the tapered top of the beehive spring for a precise, secure fit
• Compatible with up to 10,500 RPM operation when paired with the GSC 4G63 HP beehive valve spring set
• Supports cams up to 12.1mm net valve lift
• Engineered using FEA (finite element analysis) and advanced flow simulation for optimal strength-to-weight ratio and fatigue resistance
• Manufactured on dedicated CNC machining centers to tight tolerances for consistent, reliable performance
• Set of 16 retainers covers all intake and exhaust valves on the 4G63 DOHC cylinder head - complete head coverage in one set
• A must-have complement to any high-RPM 4G63 head build using beehive springs

Specifications

• Part Number: RET5041-16
• Material: Titanium
• Quantity: 16 (full set for one 4G63 cylinder head - 8 intake + 8 exhaust)
• Spring Compatibility: GSC HP Beehive Valve Springs (4G63)
• Max Supported Cam Lift: 12.1mm net valve lift
• Max Supported RPM: 10,500 RPM (when used with GSC beehive springs)
• Application: Mitsubishi 4G63 DOHC Turbocharged

Included Components

• 16x GSC Power Division Titanium Valve Spring Retainers (beehive profile)
• Note: Valve springs, keepers/locks, and camshafts sold separately

Product Description

The GSC Power Division RET5041-16 is a complete set of 16 CNC-machined titanium valve spring retainers designed for the Mitsubishi 4G63 DOHC turbocharged engine. Made from titanium, these retainers offer a significant weight reduction over conventional steel units, lowering valvetrain reciprocating mass and allowing the valvetrain to rev more freely with better control at high RPM. The beehive spring-specific profile matches the tapered top of the GSC HP beehive valve springs, ensuring a secure, properly seated fit that prevents spring walking and maintains consistent installed height across all 16 valves.

When paired with the GSC 4G63 HP beehive valve springs, this retainer set supports operation up to 10,500 RPM and is compatible with cam lift up to 12.1mm net valve lift (limited by seal-to-bottom-retainer contact). The set provides complete coverage for one 4G63 cylinder head and is an essential component for any serious high-RPM build on Evolution I-IX, DSM, and other 4G63-powered platforms. GSC beehive valve springs are sold separately (full kit p/n 5041).