Only 1 available! Left side, chrome plated, double walled, head pipe as used on Tonti frame touring models beginning in 1975 with Convert, 850T, T3, T4, T5, 1000 SP, SP2, SP3, V1000 G5, Mille GT,California II, California III, California 1100, and other big twin touring models. Original geometry 40mm outside diameter, 38mm at the exit. Built in spacer at cylinder head. Double wall pipe construction protects against heat induced discoloration. Genuine Stucchi production, made in Italy.