[pneall]

Phil,

I went with 1 3/4" primaries into 2" bends through body into 3.5" collector into 21/2" perforated tube into 3 1/2" tip.

Outside pipe 4"

Cats available from difillipo vic)or Walkers (NSW)

Wrap perforated pipe in muffler packing.

Engine flange, primaries , bends collector , perf pipe , outside pipe and muffler packing from difillipo. Just tell him its for a Cobra.

Get it all HPC coated at Leongatha (Vic) $750 and you will be happy.

Check out Mike Murphy's gallery for construction details. I followed this and am very happy with note. Not deafening , nice note when you want it, quite when cruising.

Phil.