[Rovernet] 3.5 to 3.9?

[Kent Kinard]

Now if there were only a good exhaust manifold for the V8 that would fit 
in the P5B engine compartment... Gross Scruggs Annapolis MD

Hi Gross,
There are several "better" exhaust manifolds for the P6B.  Best bolt on 
for the money is the "S" type manifold fitted to European/UK four speed 
cars.  I have had two sets of these and you can use them with the stock 
automatic trans downpipes or have slightly larger ones made up.

The most interesting installation I have seen was done by Garrett 
Bourque.  He used RR Classic manifolds and cut notches in the frame 
rails to clear them, then reinforced the frame rail by boxing in the 
edges of the notch.  This was a number of years ago and the frame hasn't 
broken off yet.  This is the car that currently sports the glass roof.

RPi Engineering may still have tubular headers for the P6B.  See this 
listing:  http://www.v8engines.com/exhaust-9.htm

Roverly,
Kent K.