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UMI Performance

UMI Performance 1973-1987 GM C10 Lowering Spindle, 2.5″ drop- CP4S4

Regular price $349.59
Regular price $379.99 Sale price $349.59
Sale

Upgrade your GM C10 with these heavy-duty 2.5" drop spindles featuring a UMI satin black powder coat for ultimate durability and an enhanced aesthetic appeal. These robust spindles are engineered to be a direct bolt-in replacement, seamlessly accepting factory GM C10 bearings and brakes, making installation straightforward and hassle-free. However, it's important to note that if your brake rotors are 1", some hot rodding will be required as detailed below.

Designed specifically for the 1973-1980 GM C10 trucks, these spindles fit perfectly with 1-1/4" brake rotors. If you own a 1981-1987 model, you might find that it comes with 1" brake rotors. In such cases, you'll need to upgrade to the 1-1/4" rotors used on the earlier models to ensure compatibility and optimal performance.

For your convenience, we have provided a list of GM-compatible part numbers below (parts not included) to facilitate this upgrade:

  • 18A2A AC Delco: Qty 2 Brake Hub/Rotor – 1.25” wide
  • 18FR640 AC Delco: Qty 1 Brake Caliper – Left Front 1.25” rotor
  • 18FR639 AC Delco: Qty 1 Brake Caliper – Right Front 1.25” rotor
  • Set 5 Timken: Qty 2 Inner Wheel Bearing – 1.375” I.D.
  • Set 3 Timken: Qty 2 Outer Wheel Bearing - 0.850” I.D.
  • 8871 Timken: Qty 2 Inner Bearing Seal
Fitment Note: Drop spindles require a 1.25" thick brake disc compared to the base 1"




PRODUCT FEATURES

  • Heavy-duty construction
  • Satin black powder coat finish
  • Direct bolt-in replacement
  • Compatibility with factory bearings and brakes
  • Designed for 1973-1980 GM C10 trucks
  • Fits 1-1/4" brake rotors
  • Adaptability for 1981-1987 models (with rotor upgrade)

 

 

Fitment 1973-1987 GM C10/C15
Platform 1973-1987 GM C10/C15
Manufacturer UMI Performance
Finish

Powder Coat

 

 

 

This 'CP4S4 - 1973-1987 GM C10 Lowering Spindle, 2.5" drop' fits the following platforms:

Fitment Note: Drop spindles require a 1.25" thick brake disc compared to the base 1"

1973-1987 GM C10/C15

  • 1973 1974 Chevrolet C10 Pickup
  • 1975 1986 Chevrolet C10
  • 1987 1987 Chevrolet R10
  • 1973 1974 GMC C15/C1500 Pickup
  • 1979 1986 GMC C1500
  • 1975 1978 GMC C15
  • 1987 GMC R1500

This CP4S4 - 1973-1987 GM C10 Lowering Spindle, 2.5" drop fits the following vehicles:

1974

Chevrolet C10 Pickup

  • 1973 1974 Chevrolet C10 Pickup

GMC C15/C1500 Pickup

  • 1973 1974 GMC C15/C1500 Pickup

1986

Chevrolet C10

  • 1975 1986 Chevrolet C10

GMC C1500

  • 1979 1986 GMC C1500

1987

Chevrolet R10

  • 1987 1987 Chevrolet R10

1978

GMC C15

  • 1975 1978 GMC C15

GMC

R1500

  • 1987 GMC R1500c

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