Billet Superlite SL6R
Radial Mount Caliper Highlights:

The Billet SL6R series adds the versatility and convenience of radial mountng 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 SL6R and SL6R/ST Calipers Standard Width Body
Calipers in this group feature a full width reinforced rib outboard body for maximum strength when caliper to hub or caliper to wheel clearance is not an issue. These calipers are primarily used for asphalt stock cars, road racing, and other competition applications with small 5 x 5 or other OE type lug patterns. 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 brake pads.

The key to the superior performance of the SL6R comes from the extremely durable and efficient body design. 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 has produced the strongest SL 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 configuation provides balanced pad loading for even pad wear in sustained high heat environments. The standard SL6R calipers feature one-piece stainless steel pistons. Stainless is used for its slow heat transfer properties and high resistance to corrosion. All SL6R/ST models feature Wilwood's exclusive Thermlock pistons. This multi-piece piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to caliper body, seals, and fluid. Cooler temperatures translate to longer service life and less chance for heat induced pedal fade.

In addition, each SL6R is equipped with SRS bridge plates. SRS plates eliminate all bridge wear caused by pad gauging and extend the service life of the caliper. The spring-loading 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 PolyMatrix pad compounds is available to match the brake response and heat range of any competition or sports driving application.

Billet SL6R and SL6R/ST Calipers with Narrowed Outboard Body:

Calipers in this group feature a narrowed outboard body to provide additional clearance between the caliper face and the wheel or hub. These calipers are primarily used with wide 5 hubs, OE Performance "Big Brake" conversions, road racing, and other close fit wheel 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 20 mm thick pads.
Thermlock T1 Short Track Piston:
Diameter
Order P/N:
1.62" (41,1 mm)
200-7553
1.12" (28,4 mm)
200-7556
Wilwood's Thermlock® T1 pistons incorporate a stainless steel shield and coated aluminum shell configuration to provide a highly efficient thermal barrier between the brake pads and the caliper body, seals, and fluid. Lower operating temperatures eliminate seal crystallization and localized fluid boiling while providing longer caliper service life through decreased distortion in the caliper body and piston bores. Thermlock® T1 pistons are standard equipment in all "ST" designated calipers. They can also be ordered separately to update stainless steel piston equipped calipers already in service.
Ordering Information:
Billet Superlite 6R Standard Width Body:
Bore Size
Disc Width
Front Mount
RH - Part Number - LH
Rear Mount
RH  - Part Number - LH
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.25"  31,8 mm
120-6115-FS    120-6116-FS
120-6115-RS    120-6116-RS
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.00"  25,4 mm
120-6113-FS    120-6114-FS
120-6113-RS    120-6114-RS
1.62/1.12/1.12"
41,1/28,4/28,4 mm
  .81"  20,6 mm
120-6111-FS    120-6112-FS
120-6111-RS    120-6112-RS
Billet Superlite SL-6R/ST Standard Width Body with Thermlock Pistons:
Bore Size
Disc Width
Front Mount
RH - Part Number - LH
Rear Mount
RH  - Part Number - LH
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.25"  31,8 mm
120-6143-FS     120-6144-FS
  120-6143-RS    120-6144-RS
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.25"  31,8 mm
        ___                   ___
      ___              120-6201-SI
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.00"  25,4 mm
120-6141-FS     120-6142-FS
  120-6141-RS    120-6142-RS
1.62/1.12/1.12"
41,1/28,4/28,4 mm
  .81"  20,6 mm
120-6139-FS     120-6140-FS
  120-6139-RS    120-6140-RS
1.62/1.12/1.12"
41,1/28,4/28,4 mm
  .81"  20,6 mm
         ___                  ___
       ___             120-6200-SI
Narrow SL6 Outboard Body:
Bore Size
Disc Width
Front Mount
RH - Part Number - LH
Rear Mount
RH  - Part Number - LH
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.25"  31,8 mm
120-7761-FS    120-7762-FS
120-7761-RS       120-7762-RS
Narrow SL6R/ST With Thermlock Pistons:
Bore Size
Disc Width
Front Mount
RH - Part Number - LH
Rear Mount
RH  - Part Number - LH
1.62/1.12/1.12"
41,1/28,4/28,4 mm
1.25"  31,8 mm
120-6385-FS    120-6386-FS
120-6385-RS    120-6386-RS