James Gaskets Panhead/Shovelhead Tappet Block Gasket - Rear Foam 5/PK 18633-48-F — Harley-Davidson (1984-1990)

James Gaskets rear foam tappet block gasket for Panhead and Shovelhead engines, sold in a 5-pack. OEM-quality seal manufactured in the U.S.A. for V-twin motorcycle valve train applications.

Features

• 5-pack quantity
• Made in the U.S.A.
• Foam construction for consistent sealing
• Direct OEM replacement

Specifications

• Brand: James Gaskets
• Manufacturer Part #: 18633-48-F
• Quantity: 5 per pack
• Length: 3 in
• Width: 4.1 in
• Height: 0.6 in
• Weight: 0.03 lbs

Fitment

Fits Panhead and Shovelhead V-twin engines.

Frequently Asked Questions

Is this for front or rear tappet block?

This is the rear tappet block gasket. Order the front gasket separately if you need both positions.

Will this fit modern engines like Milwaukee-Eight or Twin Cam?

No — this gasket is specific to Panhead and Shovelhead engines only.

Why is it sold in a 5-pack?

Pack quantity is intended for shops and riders rebuilding multiple engines or keeping spares on hand.

What's the difference between foam and paper gaskets?

Foam gaskets compress and conform to surface irregularities for a better seal on older engines with uneven machining.