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Spinach
Poppies
Flounder
A very simplistic answer, making manifolds/pipes size match the port sizes, so there is no steps, plus sizing ports to match gas flow/speed that...
Market
Vlad
Bat
Tom
Sargent
So no imports or exports then? So no Ducati for you.
Petri
Alan
Who is the ugly bloke photo bombing your wife? ;)
Fuck me !!! That sounds very angry doesn't it.
Inconsiderate
Wall
Sun
Up
Clobber
The theory as explained to me is, rough finish sets up lots of tiny vortices in the "valleys" of the roughness, and gases travel faster over these...