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EC 5mm Billet Titanium Retainer Kit with 32lbs Dual Valve Springs
EC Billet Titanium Retainers and Locks for 5.5mm Valve Stems
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EC 5mm Billet Titanium Retainer Kit with 32lbs Dual Valve Springs

Part Number: 278-50-T2-32
Online Price: $49.99
fit 5mm Valve Stems
Availability: In Stock.

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Description

EC Billet Titanium Retainers & 32lb Dual Valve Spring Kit for 5mm Valves


Unlock high-RPM stability and maximum valve train control with the EC Billet Titanium Retainers & 32lb Dual Valve Spring Kit—engineered specifically for small engine builds using 5mm stem valves. This premium kit is built for performance applications running aggressive camshaftshigh-ratio rockers, and elevated RPM ranges.


The lightweight billet titanium retainers dramatically reduce valve train mass while offering the strength and durability needed to handle extreme spring loads and cam profiles. Pairing them with our high-performance 32lb dual valve springs ensures excellent seat pressure, resistance to valve float, and superior control at high engine speeds.


Kit Includes:


Key Features:

  • Titanium construction for unmatched strength-to-weight ratio
  • Designed for dual spring setups only—compatible with both 32lb and 38lb dual springs
  • Ensures stable valve operation at high RPM with aggressive cam timing
  • Ideal for modified racing engines with upgraded cams or high-ratio rockers
  • Not for use with stock valves—we recommend pairing with EC 5mm Stainless Steel Valves


Compatibility & Fitment Notes:

Will not work with single valve springs. Requires spring pockets to be cut in most heads for proper installed height.


32lb Dual Valve Spring Specs:

Install Height

Seat Pressure

Max Lift

0.930"

32 lbs

0.435"

0.895"

36 lbs

0.400"

0.815"

45 lbs

0.320"

  • Open Pressure: 86 lbs @ 0.495"
  • Coil Bind: 0.450"

Outer Spring:

  • OD: 0.910"
  • ID: 0.722"
  • Relaxed Length: 1.22"
  • Wire Diameter: 0.091"

Inner Spring:

  • OD: 0.739"
  • ID: 0.598"
  • Relaxed Length: 1.272"
  • Wire Diameter: 0.068"


Perfect For:

  • Performance kart racing engines
  • Mini bikes and race-prepped small engines
  • Builders using EC 5mm stainless valves, billet rods, and high-lift camshafts

FAQ

Q1: Can I use this spring and retainer kit with stock valves?

A: No. We strongly recommend using EC 5mm stainless steel valves. Stock valves are not designed to handle the increased pressure from dual springs.


Q2: Will this work with single valve springs?

A: No. These titanium retainers are specifically designed for dual spring setups (32lb or 38lb). They will not seat correctly with single springs.


Q3: What engines is this kit compatible with?

A: This kit is made for engines with 5mm valve stems, including:

  • Predator 212 Non-Hemi
  • Tillotson 212R / 225R / RS
  • Wildcat 223 / 240
  • Ducar 212
  • Ghost 212 (requires undercut 5.5mm valves to accept 5mm locks)


Q4: Do I need to modify my cylinder head for installation?

A: Yes, in most cases, spring pockets must be cut into the head to ensure proper spring seating and installed height.


Q5: What kind of camshaft and rocker setup is this kit intended for?

A: This kit is ideal for engines running aggressive cam profiles or high-ratio rockers, where maintaining valve control at high RPM is critical.


Q6: How much lift can the springs handle?

A: The maximum lift varies by install height:

  • Up to 0.435" lift at a 0.930" install height
  • Coil bind occurs at 0.450", so ensure adequate clearance

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