having one at the front and one at the rear stiffens the body.....................invisible Mods..............well Anti Lift Kit , uprate your rear droplinks , there are various different suspension kits..................get a walboro Fuel Pump , Bigger injectors ...................Simtek or Ecutek ECU............decat the Downpipe and centre section of your exhaust.......you will need a decent Back Box - A Blitz Nur Spec ( she will notice this but you could kid here that was the only thing you had done )....................Then get Bob Rawle ( based in Swindon ) to re-map your car .....................she will never know until she sees the Bank Statement / Credit Card Statement