GSC 4G63 Evo DSM Valve Stem Seals (1002) VENDOR10 Available in the standard 34mm

Available in the standard 34mm size or +1mm oversized

In higher boost drag racing applications these springs can be shimmed for increased seat pressure

(1) (1310A344) O-Ring

Blow Off Valve Type H-RFL comes standard with both a mild steel and aluminum weld-on adapters

The 255 can support up to 500 HP with gasoline

GSC 4G63 Evo DSM Valve Stem Seals (1002) VENDOR10 Available in the standard 34mmGSC Power Division viton valve stem seals for 4G63 Evo and DSM. Includes a full set of 16 6. 6mm valve stem seals. These are an upgrade from the standard OEM material to help cope with the higher heat caused by high performance engines. Vehicle Fitment: Mitsubishi 4G63 1992 2006 Evolution I IX 1990 1999 Eclipse GST GSX 1990 1998 Talon TSi 1990 1994 Laser RS 1991 1992 Galant VR4 Includes: (16) Valve Stem Seals See more GSC Products