A good read for ya.

http://www.vikingspeedshop.com/how-a...ur-wrx-or-sti/

Get a ELM327 OBD adapter, and download 'Torque' app (for andriod), then download "knock detector" plugin for 'Torque". So u can monitoring knocking whenever u want.

Best $20 mods u can have.

http://www.ebay.com.au/itm/ELM327-OB...item3392f19fd2

https://play.google.com/store/apps/d...l.torque&hl=en

https://play.google.com/store/apps/d...kills.kd&hl=en

__________________
MY08 STI 422whp at 1.5bar on E85, built by Diversion Garage, assembled and tuned by EvoR

Update from new owner: 375whp at 1.4bar on 98, at Tokyo Motorsport