Backbox query
 

Can anyone help?
I've been offered a Power Engineering back box for my 03 WRX. Nearly new for £100.
Will this sound nice and burbly but not be obtrusive eg on motorway? I don't want to wake the neighbours.
Will it invalidate warranty?
I assume insurance company (Privilege) will want to screw me some more!!
Thanks guys.

Somebody must have one??!

Pretty certain the insurance company will want their 'pound of flesh', And I think you're right about the warranty , if anything major goes bang they could try to wriggle :(

Dave