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Exhaust
Time to revisit the exhaust after fitting cat replacement pipes 2005, and 
discovering that the whole exhaust need some repair work.
My first choice would be to purchase a stainless steel exhaust from BTB exhausts. 
However, I had some materials left over from a previous project and to purchase the 
extra parts and make my own out weighed the cost of outright purchase complete.
 
The standard system is basically straight through, but made with 57.5mm diameter tube.
The system I made uses 63.5mm diameter tube,  which offers almost 20% increased flow
area.

Exhaust main page

1. Overview of existing system today

2. Materials

3. Tooling

3. Mid silencer boxes

4. Rear silencer box

5. Clamps and joiners

6. Tailpipe trim

7. Tube work

8. Fitting

So, how does it perform ?
Having covered about 50 miles to allow the silencer packing to expand and settle properly, I can say that I'm very pleased
with not only the exhaust note, but pick up seems better too, maybe another 50hp  !.............ok kidding with that bit :-)
 
 It does seem to pull stronger, but that could just be me wanting it too. Hopefully a rolling road session will provide
some answers.

9. Dyno Result....the answer !

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