632500C-4 Manley Turbo Tuff Pistons EJ257 for 06-14 WRX / 04+ STi COBB These direct replacement blow-off valves

These direct replacement blow-off valves offer an easy performance improvement without the need for custom fabrication or special tools

You will need to remove the undertray to drain the can if you choose to keep your undertray installed

The GrimmSpeed Lightweight Crank Pulley reduces the rotational mass of the system

15 460-775-6545SP 17x7

We used that working envelope to maximise performance by eliminating the 90 degree bend just before the airbox

632500C-4 Manley Turbo Tuff Pistons EJ257 for 06-14 WRX / 04+ STi COBB These direct replacement blow-off valvesManley Pistons for the EJ257 motor in the 2006 2014 WRX and 2004+ STi models includes a full set of 4 pistons, wrist pins, ring sets and round wire locks. See more Manley Pistons for the EJ257 WRX & STi Vehicle Fitment: Subaru EJ257 2006 2014 WRX 2004 2021 STi Piston Specs: Part Number: 632500C4 Pin: Standard . 180" Wall Bore Size: 99. 5mm (Standard Bore) Rod Length: 5. 137" Stroke: 83mm Stroker (2. 7L) Comp Distance: 1. 130" Dome Volume: 14 cc