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ACDelco Professional 18M2538 Brake Master Cylinder Assembly

Free shipping on orders over $29.99

$136.01

$ 60 .99 $60.99

In Stock
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Pressure tested to ensure safe and confident braking
  • Cast iron and aluminum specifications; no extra stress on the brake boosting mounting
  • Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
  • Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear
  • Meets the brake performance requirements of SAE J1153 and J1154 testing, providing reliability and quality
  • Pressure tested to ensure safe and confident braking
  • Cast iron and aluminum specifications provide no extra stress on the brake boosting mounting
  • Geometrical tolerance ensures that the body and plastic reservoir match for a proper fit
  • Piston assembly and return spring help to prevent brake drag, which can cause premature brake pad wear


ACDelco Professional Brake Master Cylinders use both aluminum and iron castings, making them a high quality replacement for many vehicles on the road today. These master cylinders contain both Ethylene Propylene (EPDM) and Styrene Butadiene (SBR) rubber components to provide superior resistance to heat, corrosion, and leakage. ACDelco Professional Brake Master Cylinders are ready to bench bleed and install right out of the box - no assembly required. These premium aftermarket replacement brake master cylinders are manufactured to meet your expectations for fit, form, and function.


Beltway insider
April 15, 2025
This fit my 2005 Tundra 4-door 4x4 perfectly. Did not bother with bench bleed but did a but if it with the item installed. Then bled conventionally as I also replaced front brake hose with stainless steel. The bleed screw on unit itself had to be vented with engine running to get result desired.
Customer
April 2, 2025
Worked great on my 2004 Toyota Tundra Quad Cab 4x4. Perfect fit, quality product.
jim
February 25, 2025
I replaced a bad brake line to the rear proportioning valve, bleed the system twice and the pedal still goes to the floor.
HBTC#1
February 11, 2025
Well made product just like the OEM part. Fit on my 2006 Tundra perfectly. Quick shipping.
john rau
January 18, 2025
Used for a 2005 Toyota Tundra new master cylinder is leaking
browndog84
November 16, 2024
Great product.