The back box is the original style Scooby design back box, subtle in terms of looks and sound, friendly on the motorways and growls at playtime. Centre and back box on its own will give 18Bhp. Complete de cat system will give 25Bhp.
H&S Forester SG extra silenced 2.5'' xt & sti
- This rear silencer comes with extra silencing in the tailpipe for a quieter experience on the motorway
for cars fitted with a 2.5 inch system (standard)