Manley Subaru WRX/STi Valve Spring and Retainer Kit (w/o Valve Locks) (16 each) ford-mustang-2012 Installation requires no cutting or

Installation requires no cutting or trimming of any components and can be completed with simple hand tools

DIRECT PLUG & PLAY

Low Inertia Design: The weight of a carbon clutch disc is one third that of a metallic disc

CNC machined tri-symmetrical slots

Manley Subaru WRX/STi Valve Spring and Retainer Kit (w/o Valve Locks) (16 each) ford-mustang-2012 Installation requires no cutting orThe Manley upgraded valve spring and titanium retainer set is a great choice for Subaru EJ20 EJ25 engines with upgraded camshafts that require valve springs for increased lift and higher RPM use. The set combines Manley's upgraded 245 lbs. in valve spring set (Part# 22180 16) with their matching titanium retainers (Part# 23180 16). The retainers are manufactured from heat treated aerospace grade titanium, then CNC machined to exacting tolerances for