|| Buyers Guide-
|| Owners Manual-
From the pictures in the aerodynamics pages you will have seen how
important the rear silencer is for this car. These pictures show how the
original has been constructed, and how BTB have made a stainless
The BTB silencer sounds gorgeous! Not loud, but just a little more
presence than the standard fitment. It fits up with no modifications to
the bodywork, and uses the original mountings. You WILL need to buy a new
rear right hand bumper hanger (fit a left hand one without the towing eye)
HERE IS THE ORIGINAL BOX AFTER SURGERY.
This is the top view as the box sits across the rear of the car. The
'twin pipes' on the right are dummies which have been tacked on to show
the correct place in the bodywork for the new right hand exhaust port.
If you look closely, you can see that the box is balanced upto the rear
right hand corner, when there is a pipe added in at the bottom to take the
right hand gases out of the left hand port. Possible evidence that the Z1
silencer may have been designed as a twin outlet system.
The twin pipes look and sound good
3/4 REAR VIEW
Now lets look at the details of the new system.
This shows how the double skin is formed around the end plate. You can
just see some of the wadding inside.
The TRAILING EDGE of the wing section
The finished article.
The new box uses the original mounting points and hangers. It does, of
course have stainless pipes as well.
Underside View and how the box fits up to the bodywork