M8 Valve Spring Kit — High-Performance Valve Train Upgrade
Engineered for reliability under high-lift applications, this complete valve spring kit delivers everything needed for a proper valve train build on 2017–2026 M8 engines (non-VVT).
What's included:
- PSI Valve Springs — rated up to 0.640" lift, precision-wound for consistent seat and open pressures across all cylinders
- JHE Titanium Retainers — exclusive to this spring design, reducing reciprocating mass for improved high-RPM stability and longevity
- Triple Groove Locks — positive retention engineered to match the retainer and spring geometry
- Lower Collar with Valve Seal — complete lower end hardware included, no additional sourcing required
A high-performance valve spring kit is required for all M8 Star Cams EXCEPT the M8 30/30 and the M28 on Gen 2 engines.
Star M8 Valve Spring Kit
SKU: 640SK-2
$549.95Price
- Universal Cam Compatibility — fits any Star M8 Cam profile and any triple groove valve. Whether you're running a mild street grind or an aggressive performance cam, this kit installs without compromise.
- Drop-in fitment — Everything needed for a valve spring upgrade all in one kit. Enables you to run any Star Cam in your M8 when paired with upgraded Lifter Guides (M8726LG).
