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ACDelco Professional 18M677 Brake Master Cylinder Assembly

Free shipping on orders over $29.99

$89.56

$ 37 .99 $37.99

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.


HvYHtR
Reviewed in the United States on June 5, 2023
No problems and working fine.
Ed
Reviewed in the United States on April 3, 2022
Leaked out the back after install. Removed internals to determine leak. Bore was badly scored. I am a mechanic with 30 plus years experience
Fortunate Son
Reviewed in the United States on April 23, 2016
Buy a bleeder kit for this. It comes with "bleeder plugs" which are a bit of a joke. You're supposed to plug up the holes and try to push the plunger (which goes nowhere) and air is supposed to magically come out. It does not and one of the plugs did not fit very well. I ended up cracking the plugs to bleed on the bench and then again once it was mounted cracking the line nuts while a helper pressed the pedal.That O-ring in the picture is nowhere to be found. Fortunately, the old unit did not have an o-ring so I'm guessing I didn't need it?Stops the truck but overall, not too impressed.
mervins ramirez
Reviewed in the United States on April 23, 2015
da un frenado suave y preciso
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