Cut long story short , 5 months ago had piper turbo back fitted by pumabuild,(top blokes)about 5/6 weeks ago had a annoying rattle noise at 2.5k and was told by pumabuild it was the baffles in the back box...GREAT! But because it was only 5 months old they changed it for me free of charge and sent the old one to piper.... Now had this new piper Backbox for 3 weeks and it making the noise again!!!!!!...... Great!! ......how loud would my exhaust be without Backbox and just have 3" straight to tail pipes????