killsville:
The 320 ■■■■■■■ always sounded great blowing through an eminox stack. You could here them coming from miles away.
Now that brings back memories…
I used to drive an E14/365 erf, with an Eminox on it, sounded bloody gorgeous!
The company I was pulling for however, were not quite so keen, as they had just gone out and bought a fleet of brand new, white curtainsiders, which very soon turned into ‘white with a sooty black stripe!!’ curtainsiders!
Anyway, easy solution, lift the stack slightly, so the smoke went over the top, rather than down the side, only problem was, the trailers were 15’ tall.
Out with the calculator…
the top of the silencer was about 8 foot from the floor, which means I needed a 7foot long pipe to clear the trailers. Now it doesnt take a genuis to figure out that a 7foot long bit of pipe is not going to hold with a sngle clamp in the top of the silencer, so the only solution, is to make the pipe long enough so it goes right through the silencer, and is clamped both top and bottom…
Of course then you effectively have no silencer whatsoever, just a straight though exhaust on a 14l ■■■■■■■■ now that did sound nice!!! 
Had some usefull side effects, my load was always out ready when I got to the yard, as they could hear me coming from about 5 miles away!!!
Used to love going through Dartford with that thing!!
Unfortunalely had to remove it in the end when I went on the continent, boss reckoned the gendarmes wouldnt be too keen on it! (and before you ask, yes I was daft enough to go on the continent with a 10 year old ERF!!)