Diameter of the elbow for turbo connection

[toseland]

So "cold side" of the turbo to the inlet ports on the engine (the silver side of the turbo usually) sometimes referred to as the compressor

Airfilter --> MAF --> Turbo inlet --> pressure line to intercooler --> intercooler --> pressure line to 406 inlet elbow --> inlet manifold --> Engine..





Hot side (exhaust) the rusty side of the turbo

Engine block --> Exhaust manifold --> Turbo "hot side" or exhaust turbine --> downpipe --> Exhaust



If it's a standard turbo you are running then the cold side exit (compressed air to the intercooler) via the standard piping needs a long legged 41mm 90degree bend to fit to OEM pipes.