Need help finding parts? Question on fitment? We can help!

Give us a call 877-474-4821 or send us a message

$$401.03120-13947
120-13947
GN6R Caliper (120-13947)

Please Call for Availability

Grand National III Caliper Wilwood’s GN lll is a time proven caliper that has been widely used with 5 on 5 hubs for stock car, road course, and off-road competition. The 3.' mount configuration (also available in 6.00” mount) incorporates this legacy of enduring performance, with options available for the latest brake system heat management ...
Wilwood EngineeringGN6R Caliper

Wilwood Engineering

GN6R Caliper (120-13947)

Please Call for Availability

$401.03

Item #: 120-13947

Show Dealers
Add to Wishlist
  • Create a New List
true
Specifications
Item Specifications
Component Type
Grand National GN6R
Caliper Casting Material
Forged Aluminium
Caliper Finish
Type III Anodize
Caliper Inlet Port Diameter
1/8-27 NPT IN
Additional Parts Required
120-13946
Piston Material
Stainless
Mount Location
Left Hand
Maximum Outside Diameter
13.06 IN
Total Surface Area
5.40 SI
Piston Diameter
1.38 IN
Piston Diameter
1.75 IN
Rotor Thickness
1.38 IN
Mount Hole Center To Center
7.09 IN
Maximum Mount Hole Diameter
0.45 IN
Maximum Thickness
1.38 IN
Minimum Thickness
1.25 IN
Maximum Inside Diameter
1.25 IN
Caliper Color
Anodize
Mount Type
Radial
Use Type
7520
Caliper Piston Quantity
6
Dust Boot Included
N
Dimensions (L/W/H)
12.5 / 7.19 / 3.63
Weight
8 lbs
General
Brand
Wilwood Engineering
Item #
120-13947
MSRP
$401.03
Category
Truck / Jeep Brake Caliper
Description

Grand National III Caliper
Wilwood’s GN lll is a time proven caliper that has been widely used with 5 on 5 hubs for stock car, road course, and off-road competition. The 3." mount configuration (also available in 6.00” mount) incorporates this legacy of enduring performance, with options available for the latest brake system heat management technology.

TC6 Radial Mount Caliper
The TC 6R Radial Mount Caliper represents a complete new generation of refinement in Big Brake Technology from Wilwood. Six stainless pistons captured within a massive high strength forged aluminum body generate the stopping power and durability to stylishly handle the heavy loads of custom late model trucks and sport utility vehicles.

W6A Radial Mount Caliper
The W6A forged six piston caliper delivers heavy duty stopping power for the road or track. The caliper incorporates race technology into a body design with widespread adaptability. Radial mounting, two options for piston volume, and a redisigned rotor diameter range from 12." to 15.00" give this caliper the versatility necessary to suit all types of heavy weight braking requirements.

W4A Radial Mount Caliper
The W4A forged four piston caliper delivers heavy duty stopping power for the road or track. The caliper incorporates race technology into a body design with widespread adaptability. Radial mounting, four options for piston volume, and a newly increased rotor diameter ranging from 12.19" to 15.00" give this caliper the versatility necessary to suit all types of heavy weight braking requirements.

Billet Superlite 6 Radial Mount Caliper
The billet SL6R series adds the versatility and convenience of radial mounting to this widely popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc. These calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power in extreme environments over a broad range of vehicle applications.

Billet Superlite 6 Caliper
The billet SL6 series integrates "Big Brake" style and Wilwood's latest technology into the traditional 3.50" centered lug mount Superlite caliper category. Each caliper is precision CNC machined from high strength billet into three specialized configurations that cover a broad range of competition and sports driving applications.

Billet Superlite 4R Radial Mount Caliper
This specially configured Superlite SL4R narrow body caliper features an increased bridge radius to allow proper pad alignment and bridge clearance for use with 13.00" to 14.00" diameter rotors. A special body design is used with 16mm pads to provide the narrowest possible profile for tight clearance applications. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc.

Billet Superlite 4 Lug Mount Caliper
The billet SL4 caliper incorporates Wilwood's latest technology in a conventional 3.50" centered lug mount design, with weights starting at 4.94 pounds. This caliper series has been structurally designed for high clamping efficiency and low deflection in a body width compatible with all wide 5 and 5 × 5 style hubs. It is a direct replacement for all other Superlite style calipers.

Forged Superlite Internal Calipers
The Superlite caliper series is the benchmark in short track, late model, modified and open wheel competition. It also enjoys prominence in a variety of road-race, off-road, rally and sport driving applications. The new FSLI model series is the latest innovation to this Superlite family of calipers. It has been redesigned with internal fluid ports that eliminate the external fluid cross-over tubes, along with any potential problems that could arise from a damaged tube. The transfer tube has been replaced with two additional bleed screw assemblies which allows this group of symmetrical piston bore models to be mounted either right or left in a leading or triling position.

FNSL6R Calipers
The Forged Narrow Superlite 6R (FNSL6R) is our newest version for the venerable Superlite caliper series adds the versatility and convenience of radial mounting to this widely popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc. These calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power in extreme environments over a broad range of vehicle applications.

FNSL4R Calipers
The Forged Narrow Superlite 4R (FNSL4R) is our newest version for the venerable Superlite caliper series adds the versatility and convenience of radial mounting to this widely popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc. These calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power in extreme environments over a broad range of vehicle applications.

Billet Narrow Superlite 6R Radial Mount Calipers
The billet SL6R series adds the versatility and convenience of radial mounting to this widely popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for accurate alignment over the disc. These calipers integrate "Big Brake" style with Wilwood's latest technology to generate big stopping power in extreme environments over a broad range of vehicle applications.

Billet Narrow Superlite 6 Lug Mount Calipers
The billet SL6 series integrates "Big Brake" style and Wilwood's latest technology into the traditional 3.50" centered lug mount Superlite caliper category. Each caliper is precision CNC machined from high strength billet into three specialized configurations that cover a broad range of competition and sports driving applications.

Billet Narrow Superlite 4R Radial Mount Calipers
The Superlite caliper series has set the standard for many years in short track, late model, modified and open wheel competition. It has also enjoyed prominence in a variety of road-race, off-road, rally and sport driving applications. Starting at 4.40 pounds, the Forged Billet Superlite (FSL) is the newest innovation to this series from Wilwood. New and adaptive technologies have been applied providing substantial improvements in strength, fluid volume displacement, and overall performance.

D8-6 Calipers
D8-6 calipers are a direct bolt-on replacement for the OE calipers on all 1965-82 Corvettes. Forged billet aluminum bodies, stainless steel pistons, and high-temperature seals put an end to the rust, bore pitting and seal failures that plague the OE caliper design. D8-6 calipers provide low-maintenance performance, a huge weight savings, high temperature reliability, and the added benefit of six piston pad clamping power. D8-6 calipers mount in the stock location over stock rotors, use the original style D8 brake pads, and fit snugly inside most ’67 or newer production wheels. Some wheels, including the 1965-66 OE “JK” code steel wheels and a few aftermarket replica alloy wheels, will require a 3/16” or wider wheel spacer for clearance.

D8-4 Calipers
D8-4 calipers are a direct bolt-on replacement for the OE calipers on all 1965-82 Corvettes. Forged billet aluminum bodies, stainless steel pistons and high-temperature seals put an end to the rust, bore pitting and seal failures that plague the OE caliper design. D8-4 calipers provide low-maintenance performance, a huge weight savings, and high temperature reliability for street or track. D8-4 calipers mount tock location over stock rotors, use the original st
#120-13947

DONATE $1 TO KEEP TRAILS OPEN
Customer Reviews
Share your thoughts with other customers
Login to leave a review
Return Policy

RETURNS & EXCHANGES

All returns must be accompanied by an original or copy of the receipt within 30 days. There are no refunds/credits after 30 days. Electrical items, tools, installed parts, and some special order items are non-refundable/non-returnable.

All items returned are subject to a minimum 15% restock fee unless other arrangements were made at the time of purchase.

Shipping charges will not be refunded unless item was received damaged or defective, or an error was made on our part when processing your order. Please contact us for any further questions on non-returnable items.

In order to return any products you must contact our customer service at 1-800-341-7757 and obtain an RGA number and write it large and clear on the box being returned. Also care must be taken by you the customer to pack the returned merchandise carefully so that it does not get damaged when sent back to us. Off Road Warehouse is not responsible for any damage that occurs during shipment back to us and the product will become non-returnable if it becomes damaged during the return shipment.

DAMAGED OR DEFECTIVE MERCHANDISE

Any customer that receives damaged or defective merchandise should contact Off Road Warehouse immediately and at the latest within 30 days of the Invoice/Purchase date.

Please contact the Customer Service line at 1-800-341-7757 for more information on returning the merchandise to us and how long it will take to receive a replacement.

Off Road Warehouse does its best to make sure that all merchandise is free of defects and is shipped safely but accidents in shipping and transportation as well as manufacturing defects do happen. We will be happy to help you out and get you new merchandise as quickly as possible.

Order Cancelations

Order Cancelations are not guaranteed. Orders are processed once they are received, In some cases these are with third party vendors and manufactors. We will do everything in our power to stop an Order already in motion but sometimes we are unable to do so.

If you request a cancellation, we will confirm the order is canceled prior to issuing a refund. If your order is not able to be canceled, you must follow the Return Policy Guidelines outlined above.

Where To Buy
Questions & Answers
Be first to ask a question

​​​​​​​
SALES
PHONE SALES (PT)
  • Monday - Friday: 6 a.m. - 5 p.m.
  • Saturday: 7 a.m. - 12 p.m.
  • Sunday: Closed
Customer Service (PT)
  • Monday - Friday: 7 a.m. - 3 p.m.
  • Saturday: Closed
  • Sunday: Closed
FOLLOW US