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Wilwood 120-11128 Forged Superlite Internal Caliper, 1.38 / .81 Inch

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Specs
Centerline of Holes:
3.50
Material Type:
Aluminum
Overall Length:
9.50
Weight:
5.20
Color:
Black
Sold in Quantity:
Each
Finish:
Anodized
Thread Pitch:
1/8-27 NPT
Bore Size:
1.38
Mounted Height:
2.85
Rotor Diameter:
13.06
Piston Diameter:
1.38
Caliper Pistons:
Four
Mounting Side:
Universal
MFG. Part #:
120-11128
Rotor Thickness:
0.81
Garage Sale:
No
Caliper Mounting Type:
Lug
Bore 2 Size:
1.38
Total Piston Area:
3.00
Mount Hole Size:
0.45
Pad Area:
8.20
Pad Volume:
4.90
Wilwood 120-11128 Forged Superlite Internal Caliper, 1.38 / .81 InchWilwood 120-11128 Forged Superlite Internal Caliper, 1.38 / .81 Inch
Wilwood 120-11128 Forged Superlite Internal Caliper, 1.38 / .81 Inch

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Details

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What's in the Box

New forged design features increased strength and improved fluid displacement.  Four-piston design for 11.75" X .810" thick rotors.  1/8" npt inlet, 3.50" mounting centers.

Wilwood Spec Sheet (Link)

You may also be interested in:

Wilwood 120-9729 Dynapro Lug Mount Caliper, 3.50 Inch Mount, 1.38/1.25
SKU-8351209729
                        

These narrow mount (3.50") calipers are made of billet which gives them superior strength over the other 'Dyna' series of calipers. 1/8" NPT inlet. 

  Narrow Mount DynaPro (NDP) forged billet calipers represent the next generation of calipers available as an upgrade or direct replacement for the popular Narrow Mount Dynalite model series with 3.50" mounting. NDP calipers combine superior strength with several new performance enhancements to make these the best "Dyna" series calipers ever built.

 
The strength of the new DynaPro is a combination of process and design. NDP calipers are stress-flow forged from premium grade billet. Stress-flow forging realigns the grain structure of the metal within the contour of the body design. This process produces a part with superior strength over parts simply machined from straight grained blocks of billet. The FEA generated body design incorporates a highly fortified radial transition that eliminates steps and shoulders between the piston housings and the bridges. Incorporating a radius in this critical area substantially increases resistance to deflection and caliper body separation under load. For additional strength, all NDP calipers are fitted with center bridge bolts to provide additional resistance against separation over the center of the pads. Structural deflection and volume displacement testing have proven the efficiency of this innovative design. Reductions in overall deflection, and the subsequent decreases in fluid volume displacement, translate to increased clamping efficiency with less pedal travel. The bottom line is a firm, responsive pedal with outstanding stopping power.   

The DynaPro is loaded with other enhancements for performance and wider application. The calipers feature Quick-E-Clip pad retainers that support a 7816 type brake pad from the top. Not only does it allow for fast pad service without caliper removal, the bottom pad supports common to the earlier NDL models have been removed to create a slimmer profile with more bottom side clearance and easier mounting in tight clearance applications.   

Heavy wall stainless steel pistons are used to resist corrosion and slow the heat transfer from the pads. The heavy wall sectional thickness also provides additional strength against backside deflection to provide a firm pedal feel with efficient clamping at all pressures.   

Each NDP is also fitted with replaceable stainless steel SRS bridge plates. SRS plates eliminate the bridge wear caused by pad gouging to extend the service life of the caliper body. The spring-loading action of the SRS plates also eliminates pad rattle and dampens the vibration harmonics that contribute to squeal during engagement. The package is completed with internal fluid passages and four corner bleed screws that simplify bleeding regardless of the mounting location.  
Wilwood 120-9736-SI Narrow Dynapro Lug Mount Caliper, 3.50 Inch Mount
SKU-8351209736SI
                        

Narrow Mount DynaPro (NDP) forged billet calipers represent the next generation of calipers available as an upgrade or direct replacement for the popular Narrow Mount Dynalite model series with 3.50" mounting. NDP calipers combine superior strength with several new performance enhancements to make these the best "Dyna" series calipers ever built.

The strength of the new DynaPro is a combination of process and design. NDP calipers are stress-flow forged from premium grade billet. Stress-flow forging realigns the grain structure of the metal within the contour of the body design. This process produces a part with superior strength over parts simply machined from straight grained blocks of billet. The FEA generated body design incorporates a highly fortified radial transition that eliminates steps and shoulders between the piston housings and the bridges. Incorporating a radius in this critical area substantially increases resistance to deflection and caliper body separation under load. For additional strength, all NDP calipers are fitting with center bridge bolts to provide additional resistance against separation over the center of the pads. Structural deflection and volume displacement testing have proven the efficiency of this innovative design. Reductions in overall deflection, and the subsequent decreases in fluid volume displacement, translate to increased clamping efficiency with less pedal travel. The bottom line is a firm, responsive pedal with outstanding stopping power.

Garage Sale - Wilwood 120-6453-SI Billet Radial Mount Caliper - .380 Inch Rotor
SKU-8351206453SI
                        

The Billet NDLR caliper is a compact, lightweight, and rugged caliper that provides strong clamping force from four 1.75" stainless cup pistons. The bodies are fully CNC machined from billet with internal fluid ports that eliminate external fluid tubes. Each caliper is equipped with four corner bleeds to accommodate mounting in all positions. The bridges are equipped with stainless steel anti-rattle wear plates. These plates reduce bridge wear and provide smooth, rattle free operation of the pads.

Starting at 2.70 pounds, this compact and lightweight proven performer is now available in a radial mount configuration. The Billet NDLR calipers can be directly mounted over studs, or used with a radial mount bracket kit in place of a tab mount caliper.

Radial mount, 1.75" pistons.

Click Here for Detailed Product Sheet (pdf)

NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS

Wilwood 120-11128-RD Forged Superlite Internal Caliper, 1.38/.81 Inch
SKU-83512011128RD
                        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 trailing position. The most noteworthy feature of this new caliper design is the forging. Each body is stress-flow forged from premium grade aluminum alloy billets. Stress-flow forging re-aligns the metal's internal grain structure to flow within the contour of the caliper body. This process eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block billet. Simply stated, there is no better way to build a stronger aluminum caliper body.   The FSL body design is a highly efficient product of computer generated solid modeling and stress analysis technology. Each caliper features closed end bridges with a radial transition to the piston body housings. The elimination of machined steps and sharp shoulders in this critical area provides a measurable increase in overall body strength and resistance to deflection under load. Center bridge bolts replace cotter pins to provide additional support and allow quick access with positive brake pad retention. Clamping force, structural deflection, and volume displacement tests have proven the superior strength and efficiency of the FSL. On-track testing has proven driver satisfaction. The bottom line is better stopping power with less pedal travel.   The superior strength of this innovative new caliper is combined with proven performance features from other Wilwood designs. Each caliper is equipped with Wilwood's replaceable SRS stainless steel bridge plates. SRS plates eliminate the bridge wear caused by pad gouging and extend the service life of the caliper body. The spring-loading action of the SRS plates also eliminates pad rattle and dampens the vibration harmonics that contribute to squeal under braking. Other standard Wilwood features include high-temperature, square faced o-ring seals for positive sealing, controlled piston retraction, and long service life in high heat conditions. Stainless steel pistons are used to resist corrosion and retard heat transfer from the pads. Two-piece bleed screw assemblies provide long, reliable service life and are easily replaced if necessary.   FSLI calipers are a direct replacement for all Wilwood Superlite and similar competitive brand calipers with 3.50" centered mounting tabs. Calipers are available in the popular 1.75", 1.62, 1.38", 1.25 and 1.12 piston sizes for .81", 1.10" and 1.25" rotor widths. FSL calipers use the same 7420 type bridge bolt brake pad used in all Superlite 6 piston calipers. The full range of PolyMatrix pad compounds is available to match brake response and heat range to any application.
                    
Wilwood 150-8854K Superlite BP-10 Bridge Bolt Brake Pads, .800 Inch
SKU-8358854
                        

Genuine Wilwood and US Brake replacement brake pads for your Forged Superlite calipers with bridge bolts.

  • Width 4.74"
  • High friction throughout temperature range, High temperature range.
  • Formulation specific for use with Polymetalic coated rotors

Tech Tip:  Only use full metallic pads on coated rotors.

Sold as a set of 4, 1 set will be needed to outfit 2 calipers.

Brake Pad Brochure (PDF) 

Brake Pad Brand Guide (Link) 

Learn how to properly Bed-In your brake pads by reading our tech article.  Bedding-In Brake Pad Procedure.

Wilwood 15E6084K Superlite Poly-E Bridge Bolt Brake Pads, .800 Inch
SKU-8356084
                        

Genuine Wilwood and US Brake replacement brake pads for your Forged Superlite calipers with bridge bolts.

  • Width 4.74"
  • High friction throughout temperature range, High temperature range.
  • Formulation specific for use with Polymetalic coated rotors

Tech Tip:  Only use full metallic pads on coated rotors.

Sold as a set of 4, 1 set will be needed to outfit 2 calipers.

Brake Pad Brochure (PDF) 

Brake Pad Brand Guide (Link) 

Learn how to properly Bed-In your brake pads by reading our tech article.  Bedding-In Brake Pad Procedure.

Wilwood 15B-5939K Poly-B Brake Pad S/L Set of 4
SKU-8355939
                        
  • Medium-high friction compound with good cold response and a gently rising friction curve as temperature increases.
  • Smooth, predictable engagement with excellent control over a wide range of applications.
  • Long wearing pad in the middle temperature ranges with moderate wear in sustained high heat conditions.
  • Easily bedded without abrasion on new iron or steel rotors.
  • Race ONLY compound is a value priced, proven workhorse for most weekly category asphalt late models, sprints, modifieds, and sportsman divisions.
  • Hard braking dirt late models, DIRT modifieds, and rear inboard sprint brakes with vented iron or steel rotors.
  • SCCA club racers, rally, and auto-cross.

Tech Tip:  Only use full metallic pads on coated rotors.

Sold as a set of 4, 1 set will be needed to outfit 2 calipers.

Brake Pad Brochure (PDF) 

Brake Pad Brand Guide (Link) 

Learn how to properly Bed-In your brake pads by reading our tech article.  Bedding-In Brake Pad Procedure.