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EC 5.5mm Billet Titanium Retainers for Dual Springs
EC Billet Titanium Retainers and Locks for 5.5mm Valve Stems
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EC 5.5mm Billet Titanium Retainers for Dual Springs

Part Number: 278-55-T2
Online Price: $37.99
EC Billet Titanium Retainers for 5.5mm Dual Springs
Availability: In Stock.

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Description

EC Billet Titanium Retainers for 5.5mm Valve Stems | Dual Spring Compatible


Upgrade your valvetrain with EC Billet Titanium Retainers, engineered for high-RPM racing engines using dual valve spring setups. Designed to fit 5.5mm valve stems, these precision billet retainers offer the perfect balance of ultra-lightweight performance and extreme durability, ideal for aggressive camshaft profiles and high-ratio rocker arms.


Built from premium titanium, these retainers reduce valvetrain weight for faster response and improved stability at high RPMs. Whether you're building a competition karting engine or a high-performance modified cylinder head, these retainers help prevent valve float and deliver race-ready reliability.


Key Features & Benefits

  • Fits 5.5mm Valve Stems
  • Compatible with Dual Valve Springs Only
  • Precision-Built from Lightweight Titanium
  • Improves High RPM Stability & Reduces Valve Float
  • Ideal for Aggressive Cams & High-Ratio Rockers
  • Includes 5.5mm Valve Keepers/Locks
  • Lash Caps Not Included
  • Valves Sold Separately

Important: Do not use dual springs with stock valves. We recommend pairing these retainers with 5.5mm stainless steel performance valves for optimal reliability.


Part Number: 278-55-T2

Compatibility:


Recommended Applications

  • High-performance racing engines
  • Large-valve modified cast heads with 5.5mm stem valves
  • Engines with high lift cams and/or high rocker ratios


What's Included:

  • (2) EC Billet Titanium Retainers
  • (2) 5.5mm Valve Keepers / Locks


Suggested Pairings (Sold Separately):

  • 5.5mm Stainless Steel Valves
  • Dual Valve Springs (32lb, 38lb, or GP-965)
  • Lash Caps

FAQ

Are these retainers compatible with single valve springs?

No. These retainers are designed specifically for dual valve spring setups. They are not compatible with single spring configurations.


What valves should I use with these retainers?

Use 5.5mm stainless steel performance valves. Do not use dual springs with stock valves, as this may lead to failure.


Are valve keepers included?

Yes. The kit includes 5.5mm valve keepers/locks. Lash caps are not included and should be purchased separately if needed.


What engines are these best suited for?

These retainers are ideal for high-RPM engines with modified cylinder heads using 5.5mm stem valves, especially when running high-lift camshafts or high-ratio rockers.

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