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Fits 1948 thru 1964 FL models (OHV 74CI Big Twin), also known as Panhead
These 3-piece crossover header sets have the stock 1 3/4" (45mm) in diameter. Installation requires hand fitting during final assembly. It is required to loosen motor mount bolts during installation to allow pipes to adjust to motor position. Then re-tighten engine bolts. Headers have a chrome finish.