Help is just a click away!
Click here to chat with a Speedway Team Member
Online - Chat with us!
Products to Compare (max of 3)
Compare These Parts
Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Customer Service
Since 1952
  • Expert Tech Support
  • Huge Inventory
  • Fast Shipping
Talk to the Experts. Call 800.979.0122
Shop By
Street Race Truck More... The Toolbox
Add to Cart
Wilwood 120-11670-N W4A Radial Mount LH Caliper, 1.12 Piston/1.10 Disc
Wilwood 120-11670-N W4A Radial Mount LH Caliper, 1.12 Piston/1.10 Disc

Wilwood 120-11670-N W4A Radial Mount LH Caliper, 1.12 Piston/1.10 Disc

Universal Fit, Four Caliper Pistons, 1.10" Rotor Thickness, Aluminum, Nickel, 1.12" Bore Size

0 Reviews | 0 Answered Questions
Factory Shipped
Ships FREE
Select your vehicle to verify fitment.
Select Vehicle
Wilwood 120-11670-N W4A Radial Mount LH Caliper, 1.12 Piston/1.10 Disc
Wilwood 120-11670-N W4A Radial Mount LH Caliper, 1.12 Piston/1.10 Disc
Zoomed In Image
We estimate this item will ship on or before January 22nd.
Part # 83512011670N
Save 7%
Add to Cart
Call to Order
Add to Buildlist

Videos & Articles

Important Messages:

  • This item ships directly from the manufacturer. It may take an additional 2 business days for Wilwood to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.


Caliper Pistons:
Rotor Thickness:
Material Type:
Bore Size:
Centerline of Holes:
Thread Pitch:
1/8-27 NPT
Rotor Diameter:
15 Inch
Caliper Mounting Type:
Mounting Side:
Left Hand
Bore 2 Size:
Total Piston Area:
1.98 sq. in.
Mount Hole Size:
Mounted Height:
Pad Area:
11.00 sq. in.
Pad Volume:
5.20 cu. in.
GTIN Code:


Quick-Silver series W4AR nickel plated forged billet four piston calipers provide matched bias rear braking for use in conjunction with the W6AR front calipers. W4AR calipers incorporate race technology into a radial mount body design with widespread adaptability and an expanded rotor compatibility range from 12.19 to 15.00 , including update options for all W4AR Big Brake kits. Stainless steel pistons, high-temp seals, SRS bridge plates, and two-piece bleed screw assemblies are standard in all calipers. Two high performance street, and four high-temp race only brake pad compounds in the 6617 pad type, allow precise tuning of the brake response, friction requirements and temperature range for all types of high performance and competition applications. The W4A body is the product of FEA computer design and stress flow forging technology. FEA technology allows the designer to test the prototype in a computer environment to determine the optimal structural design within the dimensional parameters of the component. Stress flow forging produces a part with the internal grain structure of the metal aligned in the direction of the flow of the body contour. The results are a caliper with superior clamping efficiency and ultimate strength against fatigue, stresses, and distortion under load. The performance of the W4A is enhanced with SRS bridge plates, snap-ring locked pad retainer pins, recessed two-piece bleed screw assemblies and dampen mounted fluid transfer tubes. SRS bridge plates eliminate all bridge wear caused by pad gouging. The spring-loaded action of the plates also eliminates pad rattle. Snap ring clips lock the pad pins in place to provide positive retention and allow easy service without caliper removal. The bleed screws are recess mounted for protection against impact and debris. The fluid tubes are dampen mounted to protect them from fatigue or damage from vibration or debris. Calipers are anodized in high luster black to protect from corrosion and maintain their high-tech appearance. The W4A is also available with a gloss red finish or other custom Wilwood color by order.
Some parts are not legal for use in California or other states with similar laws/regulations

More Like This


Q & A

Videos & Articles
  • We get a lot of questions about brake kits so Tim gives a brief overview of disc brake setups.
  • If you're changing your brake pads before you hit your first race, it's important to burnish or bed-in your new pads. Check out our quick tech-tip on bedding brakes and how to minimize pad wear and get the best performance out of your brakes.
  • After getting the control arms and drop spindles installed last time, we are dying to see what it looks like on the ground. Today we are working with the Speedway Deluxe Disc Brake Kit. Josh and Joe are on a roll!
  • Getting started on the brakes and more!

You May Also Like