will a back box from a turbo fit non turbo
 

hi im looking to change my backbox on my classic sport as its too loud
just wondering if a backbox from a turbo round the same age fit mine without any modifications
thanks

Unfortunately not, they are different lengths as I found out when I went from sport to turbo in a classic

On my 97 Sport I had a Turbo backbox that fitted straight on, no messing about. On my 2000 Sport they mechanic had to weld a 3" piece on to fill the gap. So maybe it depends on the specific year of the car.