Name: Billet Superlite 6 ST-W5 Caliper
Brand: Wilwood
Availability: InStock

Billet Superlite 6 Lug Mount Caliper – Part No: 120-6388-rs

Call (805) 388-1188

Billet Superlite 6 ST-W5

Prod #: 120-6388-RS

Price: $607.99

Billet Superlite 6 ST-W5 - Product Summary

Caliper No: 120-6388-rs

Pistons
Piston Count	6
Piston Area (in²)	4.04
Piston Type	Thermlock
Dust Boot	No
Rotor Dimensions
Rotor Width (in)	1.25
Rotor Diameter(in)	13.06
Pad Dimensions
Pad Area (in²)	8.2
Pad Volume (in³)	4.9
Duty Rating & Material
Material	Billet Aluminium
Weight(Lbs)	5.8
Colors & Finish
Color	Black
Finish	Black Anodize

Mounting
Mount Center(in)	3.50
Mount Position	Rear Mount
Mount Side	Left Hand
Mount Type	Lug
UPC Number
UPC	889545004571

Product Documents

Product Data Sheet

Click To Download

Installation Instructions

	WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov
	Applicable to Brake Pads Only

120-6388-rs - Product Description

Billet Superlite 6 ST-W5

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.

The key to the superior performance of the SL6 comes from the extremely durable, efficient and lightweight body design. Starting at 5.06, pounds it is the product of computer generated solid modeling and FEA stress analysis technology. Full length stiffening ribs and a reinforced radial transition from the piston bore housings to the closed end bridges have produced the strongest Superlite caliper bodies ever built. When compared to open bridge calipers that use tube or stand spacers between the body halves, the closed end bridge design is measurably stronger with less separation or deflection under load. Additional strength and resistance to deflection comes from the four high-strength steel end bridge bolts. A fifth center bridge bolt provides even more overall strength and easy access to the pads without the need to remove the caliper from the mount.

A unique six-piston differential bore configuration provides balanced loading for even pad wear in sustained high heat environments. The standard SL6 calipers feature one-piece stainless steel pistons. Stainless is used for its slow heat transfer properties and high resistance to corrosion. The SL6/ST models feature Wilwood's exclusive Thermlock® pistons. This multi-part piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to the caliper body, seals, and fluid. Cooler temperatures translate to longer service life and less chance for heat induced pedal fade.

Vehicle Applications

Driving Environment	Vehicle Sub-Types	Application Duty

Street Performance	Domestic	Heavy Duty

Street Performance	Import	Medium Duty

Rally		Heavy Duty

Road Race		Heavy Duty

Late Model Asphalt	ASA, All Pro, SW Tour, etc...	Heavy Duty

Stock Cars	NASCAR, BGN, CTS, ARCA, etc...	Heavy Duty

Northeast Modified	Dirt or Pavement	Heavy Duty

Open Wheel	Sprint, Midget, etc… Dirt or Pavement	Heavy Duty

Off Road		Heavy Duty

Driving Environment	Street Performance
Vehicle Sub-Types	Domestic
Application Duty	Heavy Duty

Driving Environment	Street Performance
Vehicle Sub-Types	Import
Application Duty	Medium Duty

Driving Environment	Rally
Vehicle Sub-Types
Application Duty	Heavy Duty

Driving Environment	Road Race
Vehicle Sub-Types
Application Duty	Heavy Duty

Driving Environment	Late Model Asphalt
Vehicle Sub-Types	ASA, All Pro, SW Tour, etc...
Application Duty	Heavy Duty

Driving Environment	Stock Cars
Vehicle Sub-Types	NASCAR, BGN, CTS, ARCA, etc...
Application Duty	Heavy Duty

Driving Environment	Northeast Modified
Vehicle Sub-Types	Dirt or Pavement
Application Duty	Heavy Duty

Driving Environment	Open Wheel
Vehicle Sub-Types	Sprint, Midget, etc… Dirt or Pavement
Application Duty	Heavy Duty

Driving Environment	Off Road
Vehicle Sub-Types
Application Duty	Heavy Duty

Product Specifications

Rotor Compatibility
Rotor Width (in)	1.25
Maximum Rotor Width (in)	1.38
Minimum Rotor Width (in)	1.19
Maximum Rotor Diameter(in)	13.06
Minimum Rotor Diameter(in)	11.75

Brake Pad Specifications
Brake Pad Type 1	7420
Brake Pad Type 2	N-A
Brake Pad Type 3	N-A
Total Pad Area (in²)	8.2
Total Pad Volume (in³)	4.9
Mount

Piston Specifications
Piston 1 Bore (in)	1.62
Piston 2 Bore (in)	1.12
Piston 3 Bore (in)	1.12
Total Piston Area (in²)	4.04

Mounting Specifications
Mount Type	Lug
Mount Side	Left Hand
Mount Center(in)	3.50
Mount Hole Size(in)	0.45
Mount Height(in)	2.85
Inlet Thread Size	1/8-27 NPT

Pad Dimensions & Part Numbers

Pad Dimensions for the Billet Superlite 6 ST-W5 Zoom Image

Axle Set P/N

Pad Type

Compound

Non-Bedded Pads - by Compounds

150-8854K

7420

BP-10

150-20-7420K

7420

BP-20

150-28-7420K

7420

BP-28

150-14773K

7420

BP-30

150-35-7420K

7420

BP-35

150-12245K

7420

BP-40

150-Q-7420K

7420

BP-Q

15A-5938K

7420

PolyMatrix A

15E-6084K

7420

PolyMatrix E

15H-8114K

7420

PolyMatrix H

Bedded-In Pads - by Compounds

150-12245K-B

7420

BP-40

15A-5938K-B

7420

PolyMatrix A

15B-5939K-B

7420

PolyMatrix B

15H-8114K-B

7420

PolyMatrix H

Mount Dimensions & Part Numbers

Dimensions for the Billet Superlite 6 ST-W5 Zoom Image

Additional Notes

In addition, each SL6 is equipped with SRS bridge plates. SRS plates eliminate all bridge wear caused by pad gouging and extend the service life of the caliper. The spring-loaded action of the SRS plates also eliminates pad rattle and dampens the harmonic vibrations that contribute to pad squeal. Two piece bleed screws and dampened fluid tubes are recess mounted to shield them from track debris and other potential damage sources. High temperature, square faced bore seals provide the largest possible sealing area and controlled piston retraction on release. The full range of Wilwood pad compounds is available to match the brake response and heat range of any competition or sports driving application.

Calipers in this group feature a reduced width outboard body to provide additional clearance between the caliper face and the wheel or hub. These calipers were originally built for use with wide 5 hubs, but have found their way to other close fit wheel and hub applications. The caliper bridge radius will clear rotors from 11.75" to 13.00" in overall diameter. Each caliper in this group uses 7420 type 20mm thick pads.

Parts & Accessories

O-Ring Kit	130-5972
Replacement Dust Boot	N-A
Replacement Piston 1	200-7553
Replacement Piston 2	200-7556
Replacement Piston 3	200-7556
Replacement Piston 4	N-A
Cross-Over O-Ring Kit	N-A

Bridge Bolt Kit	230-5978
Wear Plate L/H	300-5923
Wear Plate R/H	300-5922
Pad Retainer	N-A
Bleed Screw Kit	220-6069
Self Bleeder Tube	190-8310
Cross-Over Tube	190-5975

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