Harley Twin Cam 88 OEM Cylinder Heads Pair 16723-99 16725-99 1999-06
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Matching pair of genuine Harley-Davidson Twin Cam 88 cylinder heads consisting of front head 16723-99 and rear head 16725-99. Both heads are complete with valves and springs and are in very nice overall used condition.
Part Number / Markings: 16723-99 Front / 16725-99 Rear
Condition: Used – Very Good / Complete with Valves and Springs
DETAILS: The pair shows normal signs of age, installation, and previous engine use. No broken cooling fins were found during visual inspection, and the heads are complete with the visible valves and valve springs.
USED PARTS DISCLAIMER: This is a used motorcycle part and may show normal signs of age, installation, removal, storage, and previous use, including scratches, scuffs, discoloration, surface corrosion, paint loss, oxidation, or other cosmetic wear. Any known damage or defects are noted when known. Unless otherwise stated, the photos show the actual item being sold and are considered part of the description.
FITMENT NOTES: These casting numbers are commonly associated with 1999-2006 Harley-Davidson Twin Cam 88 engines across Touring, Dyna, and Softail applications, with model-specific revisions during the range. Harley began Twin Cam Touring and Dyna applications in 1999, while Softail Twin Cam applications followed in 2000. Verify casting revisions, valve guides, intake-manifold flange style, combustion-chamber condition, and your exact model/year before installation.
FITMENT: Buyer is responsible for verifying fitment before purchase. Fitment information is provided as a reference based on available part numbers, casting marks, bore measurements, and published references. Engines may have been modified over time, so compare part numbers, combustion chamber, valve configuration, bore, cylinder height, base spigot, mounting points, and photos with your existing engine components.
QUESTIONS? Send us a message before purchasing if you need additional measurements, photos, condition details, or clarification on what is included.
SHIPPING: Orders are typically processed and shipped within 1–2 business days after payment. Tracking is provided once the order ships. Engine parts are packed carefully according to their size and weight.
