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The seat duration numbers listed below are different for intake and exhaust only because of where the valve clearance is set. Almost all of the profiles listed below are the same for intake and exhaust. If the exhaust profile is different from the intake profile there will be a duration number at . 050" lift and a cam lift number on the exhaust specification line.
Some of the old 1300 cams have an "A" cast on the intake cam and an "S" cast on the exhaust cam. The casting numbers on all Alfa Romeo cams do designate a specific camshaft profile.
LIFTER DIAMETER:
l.378" FOR l750cc & 2000cc ENGINES
1.495'' FOR 2600 6 CYL. ENGINE
