Hastings Ring Set — 94mm, 1.75×2×4 Cast Iron | VW Type 1 & Type 4 (98-1235-B)

Hastings piston ring set for 94 mm bore VW Type 1 big-bore engines with a 1.75 mm top compression ring. Cast iron compression rings — Hastings' standard street-quality material. The 1.75 mm top is a Type 4-style ring stack on a 94 mm bore, common on certain aftermarket piston/cylinder kits — confirm yours uses this stack before ordering.

Application

• 94 mm bore — pistons machined for a 1.75 mm top compression groove
• Common on certain Type 1 big-bore kits and some Type 4 / 914 applications
• Pair with matching 94 mm pistons cut for this stack

Ring Stack — read before ordering

Hastings rings are specified by their groove widths in millimeters, in the order top compression / second compression / oil control:

• Top compression: 1.75 mm
• Second compression: 2 mm
• Oil control: 4 mm
• Material: Cast iron compression rings

Confirm the ring groove widths cut into your pistons match this stack before ordering. The three 94 mm sets (1.5 / 1.75 / 2 mm top) are NOT interchangeable.

Specifications

• EMPI Part #: 98-1235-B
• Set covers 4 cylinders (one complete engine)

About Hastings

Hastings has been making piston rings in the United States since 1915. Their cast iron and chrome ring sets are a long-standing standard for air-cooled VW engine rebuilds — known for consistent quality and tight gap tolerances out of the box.