Subaru 2002 IMPREZA Service Manual page 1052

MECHANICAL
3. CYLINDER HEAD AND VALVE ASSEMBLY
(1) Exhaust valve
(2) Intake valve
(3) Cylinder head
(4) Valve spring seat
(5) Intake valve oil seal
GENERAL DESCRIPTION
(6) Valve spring
(7) Retainer
(8) Retainer key
(9) Valve lifter
(10) Shim
ME(TURBO)-10
(11) Exhaust valve oil seal
(12) Intake valve guide
(13) Exhaust valve guide
S2M1197A