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Description
Drum Brake Wheel Cylinder (Premium series)
What it does
Converts hydraulic pressure from the brake system into force that pushes the brake shoes against the drum to stop the vehicle
Key Specs
Bore size: ~1‑5/16″ (33.3 mm)
Pistons: 2 piston design
Mounting: 4-bolt
Inverted flare ports, 10 mm threads
OE-style replacement with brass inserts / aluminum casting
Typical Fitment (Medium-duty trucks)
Commonly used on:
1997–2002 Chevy W4500 / W5500 Tiltmaster [finditparts.com]
1997–2002 GMC W4500 / W5500 Forward
1998–2002 Isuzu NQR / NPR-HD
Cross references
Raybestos: WC370250
OEM refs: 97168757, 97332038, 8971687570
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