Ferrea Dual Valve Spring Kit for 4G63 Evo 4-9 (KT4013) Zeitronix 63 21304210189 S Cover Ported

63 21304210189 S Cover Ported T3 Inlet 5-Bolt Outlet with Wastegate Hole

replacing every core component in the OEM system

These pistons feature skirt diameters that correspond to the OEM Grade 1

Aluminum components on the Generation 8 series coilovers are designed for optimal efficiency by maximizing weight savings without compromising integrity

Ferrea Dual Valve Spring Kit for 4G63 Evo 4-9 (KT4013) Zeitronix 63 21304210189 S Cover PortedFerrea dual valve spring kit for the Evo 4 5 6 7 8 9 includes a full set of 16 dual springs, titanium retainers, seat locators and valve locks. Vehicle Fitment: 1996 2006 Evolution IV V VI VII VIII IX Includes: (16) Dual Springs (S10084) (16) Titanium Retainers (E11052) (16) Seat Locators (SL1041) (16) Valve Locks (32 pieces) (K10035) More Info: Ferrea valve springs are heat treated and stress relieved, which dramatically increases the spring's life.