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SKU: 120-17683 | UPC: 889545117035
Wilwood Forged Dynalite Internal Caliper Type III Anodized 1.75in Piston 1.25in Rotor - Fits 1947-1966 Chevrolet GMC Trucks
This right-hand Forged Dynalite Internal Caliper from Wilwood features a Type III anodized finish 1.75-inch square bore piston and matches 1.25-inch thick rotors up to 12.19 inches in diameter. It bolts to factory-style mounts on 1947-1966 Chevrolet and GMC trucks for direct replacement braking upgrades. The design cuts unsprung weight to 3.35 pounds per caliper while delivering even pad pressure across 5.36 square inches of pad area for consistent stops under hard use.
Key Features
- Forged 6061-T6 Aluminum Body: Delivers aircraft-grade strength at just 3.35 pounds to improve handling and suspension response
- Type III Hard Anodized Black Finish: Resists corrosion and withstands track or street abuse for years of service
- 1.75-Inch Square Bore Piston: Applies uniform force to pads for progressive feel and resistance to fade during repeated stops
- 1.25-Inch Rotor Compatibility: Works with 11.00-12.19-inch diameter rotors common in performance truck conversions
- Internal Pad Design: Positions pads inside the caliper for maximum area and easy access without wheel clearance problems
Product Notes
- Right-hand caliper pairs with left-hand 120-17684 for complete front setup
- Uses Wilwood pad number 7419 with BP-10 or BP-20 compounds for track or street
- Securely boxed for protection during transit
Installation Notes
- Professional installation recommended.
- Requires matching Wilwood bracket kit such as those in 140-10204 series for 55-59 trucks
- Mounts with 3/8-24 x 1.75-inch grade 8 bolts torqued to 30-35 ft-lbs
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1947-1954 | Chevrolet | 3100 Pickup | All |
| 1947-1954 | GMC | 100 Series | All |
| 1947-1954 | GMC | 150 Series | All |
| 1947-1954 | GMC | 250 Series | All |
| 1955-1959 | Chevrolet | 1500 Series | All |
| 1955-1959 | Chevrolet | 3100 Pickup | All |
| 1955-1959 | Chevrolet | 3600 Pickup | All |
| 1960-1966 | Chevrolet | C10 Pickup | 2WD |
| 1960-1966 | Chevrolet | C20 Pickup | 2WD |
| 1960-1966 | GMC | C1500 Pickup | 2WD |
Why Choose Wilwood?
- Engineers disc brakes for racing since 1977 with real-world testing
- Builds every caliper in the USA from premium materials
- Designs for drag strip demands and daily drivers alike
Frequently Asked Questions
-
Q: Does this caliper fit 1955-1959 Chevy trucks?
A: Yes it bolts to Wilwood kits like 140-10204 using factory-style internal mounts on 55-59 Chevrolet 3100 3600 and GMC equivalents. -
Q: What material and finish are used?
A: Forged 6061-T6 aluminum body with Type III hard anodizing in black for corrosion resistance and durability. -
Q: What warranty applies and are pads included?
A: Backed by Wilwood 1-year limited warranty pads and rotors sold separately with pad 7419 recommended.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: 9 x 7 x 5 inch box
- Weight: 3.35 lbs
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