Raybestos
Master Cylinder, Non-Quick-Takeup (K2500/K3500 Upgrade) - Chevrolet/GMC K1500 - MC390257
Master Cylinder, Non-Quick-Takeup (K2500/K3500 Upgrade) - Chevrolet/GMC K1500 - MC390257
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Master cylinder, non-quick-takeup, for the Chevrolet/GMC K1500, HD front caliper upgrade.
Part numbers
Raybestos MC390257, cross-references GM 18029968.
Fits
K1500/C1500, 1994-1999.
Why it matters
The HD front caliper upgrade requires this master cylinder to function correctly. The stock quick-takeup master cylinder is designed for a different caliper type and will not properly feed the larger caliper piston, resulting in a long, spongy, or unsafe pedal.
What you get
One master cylinder.
This is a required companion part if you're installing the HD front caliper upgrade — not optional.
Give us your VIN if you're not certain on fitment, we'll check it before anything ships.
Goes with this
- HD Front Calipers — Pair (K2500/K3500 Upgrade) — this master cylinder is required for those calipers to work correctly.
- Performance Front Brake Pads (K2500/K3500 spec) — matched to the HD caliper's larger piston.
- Front Brake Rotors — if you're already in there, do the rotors now.
- Braided Stainless Front Brake Lines — the right time to ditch the old rubber lines.
- OBS-UAE HD Front Brake Upgrade Kit — all four parts together as a matched set. The complete job in one order.
Description
Master cylinder, non-quick-takeup, for the Chevrolet/GMC K1500, HD front caliper upgrade.
Part numbers
Raybestos MC390257, cross-references GM 18029968.
Fits
K1500/C1500, 1994-1999.
Why it matters
The HD front caliper upgrade requires this master cylinder to function correctly. The stock quick-takeup master cylinder is designed for a different caliper type and will not properly feed the larger caliper piston, resulting in a long, spongy, or unsafe pedal.
What you get
One master cylinder.
This is a required companion part if you're installing the HD front caliper upgrade — not optional.
Give us your VIN if you're not certain on fitment, we'll check it before anything ships.
Goes with this
- HD Front Calipers — Pair (K2500/K3500 Upgrade) — this master cylinder is required for those calipers to work correctly.
- Performance Front Brake Pads (K2500/K3500 spec) — matched to the HD caliper's larger piston.
- Front Brake Rotors — if you're already in there, do the rotors now.
- Braided Stainless Front Brake Lines — the right time to ditch the old rubber lines.
- OBS-UAE HD Front Brake Upgrade Kit — all four parts together as a matched set. The complete job in one order.
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