Harddrive Twin Cam Cylinders - 88/96 3.75" STD BRE Cylindr Black W/Machined Fin… — Harley-Davidson (1999-2018)

Harddrive Twin Cam cylinders with cast iron sleeves and aluminum construction, finished in black powder coat with machined fins for an OEM appearance. Sold individually and require finish honing and piston matching before installation—ideal for stock replacement or displacement upgrades on V-twin engines.

Features

• Black powder coat with machined fins
• Aluminum cylinders with cast iron sleeves
• Requires finish honing and piston matching
• Sold individually

Specifications

• Brand: Harddrive
• Manufacturer Part #: 88187
• UPC: 191361123429
• Length: 10.2 in
• Width: 10.2 in
• Height: 10.2 in
• Weight: 10.36 lbs
• Country of Origin: Japan

Fitment

Fits V-twin motorcycles, including EVO and Sportster applications.

Frequently Asked Questions

Do these cylinders come ready to install?

No — cylinders must be finish honed and matched to your pistons before installation. Pistons are sold separately.

Are these sold as a pair or individually?

Sold individually. You will need to order two cylinders for a complete V-twin engine rebuild.

What's the difference between these and OEM cylinders?

Harddrive cylinders offer the same cast iron sleeve and aluminum construction as factory units, with black powder coat and machined fins for a clean look.

Can I use my old pistons with these cylinders?

Pistons must be matched and finish honed to the cylinders during assembly. A machine shop can perform this service, or you can order new pistons separately.