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Hastings, 3-7/8" chr/moly piston ring set. STDReplacement for 99 06 Twin Cam models that are equipped with the 95" (1550cc) 3 7 8" OEM big bore kit. Also fits 07 17 Twin Cam 103" (1690cc) engine. Std cyl. bore: 3. 875" (98. 425mm). 1st ring: 1. 5mm. 2nd ring: 1. 5mm. oil ring: 2. 5mm. Tech tip: Piston grooves vs piston rings. It''s not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top

Features removable and washable inner lining

Perfect to place your Gauge Bezel for the speedo/tach cluster without running out of wiring length

Fit perfectly over stock HD mounts

handlebars and seat posts of bicycles

The Alloy Art Dyna Stabilizer reinforces the connection between the drivetrain and frame

one for the headlight and one for a turn signal

With easy to read display in Nm and ft

OEM replacement reference 37000258

0 with DSP noise filter

without removing the transmission case from the frame

Can be adjusted vertically and rotated out of the way when passenger gets on or off

As some of the smallest helmets on the market