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Brian Crower BC0100S Single Valve Spring & Steel Retainer Kit for Mitsubishi 4G63 Evolution 8/9

$195.00

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Brian Crower BC0100S Single Valve Spring & Steel Retainer Kit for Mitsubishi 4G63 Evolution 8/9

$195.00

$195.00

Fits 2003-2007 Mitsubishi Evolution VIII and IX (4G63).

Ensure valvetrain stability and protect your engine from valve float at high RPM with the Brian Crower BC0100S Single Valve Spring and Steel Retainer Kit. This kit is engineered specifically for the 4G63 platform, providing an essential upgrade over factory components when moving to more aggressive camshaft profiles or increased boost levels.

Each kit features single-wound springs designed for consistent seat pressure and precision-machined steel retainers that offer maximum durability for street and track applications. By maintaining tighter control over valve movement, this setup helps prevent catastrophic piston-to-valve contact and ensures the valvetrain remains settled under high-load conditions.

  • Engineered for Mitsubishi 4G63 Evolution 8 and 9 models
  • Includes high-quality single valve springs (16)
  • Includes precision-machined steel retainers (16)
  • Designed to prevent valve float and harmonic resonance
  • Manufacturer Part Number: BC0100S

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