Subaru WRX STI 2.5 EJ257 Mahle pistons 99.50mm CR 8.5 930285017

Bore size

99.50mm

Stroke

79.00mm

Mahle compression ratio (CR)

8.5:1 - 56cc cylinder head

9.1:1 - 50cc cylinder head

OEM compression ratio (CR)

8.0:1

Dome volume (CC)

-19.25cm³

Compression height (CH)

30.70mm

Pin diameter

23mm

Features

4032 material

Fits for

Subaru WRX STI 2.5 (EJ257)