632702C-4 Manley Pistons 2015-2021 WRX FA20 STMREVAMP Can use OEM valve springs
Yard notes & kiln story
Description
632702C 4 Manley Pistons 2015 2021 WRX FA20 STMREVAMP Can use OEM valve springs Can use OEM valve springs if boost and RPM limit are kept original SAE J2360 and Chrysler spec MS 9763