GM / Delco Moraine 5462088 (903‑X / K‑3326) Brake Cylinder Repair Kit – NOS

Description:

GM / Delco Moraine 5462088 (903‑X / K‑3326) Brake Cylinder Repair Kit – NOS

Genuine New Old Stock Delco Moraine 903‑X wheel‑cylinder rebuild kit for mid‑1950s GM full‑size models. Correct for 1955–58 Chevrolet (150, 210, Bel Air, Biscayne, Impala) and 1955–58 Pontiac (Chieftain, Star Chief, Bonneville) front wheel cylinders using the 1" bore design.

This is an original Delco service part—ideal for concours restorations, OEM‑correct repairs, or period‑authentic parts collections.

Details: • GM Part: 5462088 • Delco Kit: 903‑X • Alternate Kit: K‑3326 • Application: Front wheel cylinders (1") • Models: Chevrolet & Pontiac full‑size, 1955–58 • Condition: NOS, stored in climate‑controlled inventory

A rare early‑Delco brake component—highly desirable for Tri‑Five restorations.

GM / Delco Moraine 5462088 – 903‑X (K‑3326) is one of the older Delco brake‑service kits—part of the 903‑series, which predates the 904‑ and 905‑series kits you’ve been cataloging. These were used on mid‑1950s GM full‑size cars, primarily Chevrolet and Pontiac, and are noticeably harder to find in clean NOS condition.

903‑X / 5462088 part identity

GM Part: 5462088 Delco Moraine Kit: 903‑X Alternate Kit Number: K‑3326 Type: Wheel Cylinder Repair Kit Bore Size: 1" (typical for 903‑series front cylinders) Era: Mid‑1950s GM full‑size Typical contents: Rubber cups, boots, spring, retainers (varies slightly by production year)

The 903‑series was the Delco service line for 1955–1958 full‑size GM platforms before the 901/902/904/905 redesigns.

Fitment chart (verified cross‑reference)

Chevrolet – Full‑Size (Front Wheel Cylinders)

Pontiac – Full‑Size (Front Wheel Cylinders)

Notes

• 903‑X is a front‑cylinder kit for the 1" Delco cylinders used across these platforms.

• It was superseded by 901‑series kits in later service manuals.

• These kits are significantly rarer than 904‑R, 904‑Z, or 905‑series kits.