User Manual
4700 Calle Bolero • Camarillo, CA 93012 • www.wilwood.com • Sales: 805 / 388-1188 • Fax: 805 / 388-4938
119 REV DATE: 11-27-06
BILLET
DYNAPRO CALIPER
Caliper Highlights:
The DynaPro four-piston radial mount caliper combines pure race
technology with a new generation of Wilwood performance
enhancements. Its sleek profile, superior strength, and durability in
adverse conditions are easily adapted to a broad range of sports,
rally and off-road driving applications.
The strength of the DynaPro is a combination of process and
design. The process of stress-flow forging re-aligns the metal's
grain structure within the contour of the caliper body. This
eliminates the stresses and interruptions to the internal grain
structure that occur when machining a straight block billet. The FEA
generated radial transition design eliminates steps and shoulders in the
area between the piston housing body and the caliper bridges. Incorporating
a radius in this critical area substantially increases resistance to deflection and
caliper separation under load. Structural deflection and volume displacement
tests have proven the efficiency of this innovative design. Without even considering
the overall greater strength and reliability of the billet forging, the reduction in overall deflection
and fluid volume displacement translate to increased clamping efficiency with less pedal travel. The bottom line is a firm pedal with
outstanding stopping power.
The superior strength of this innovative design is combined with a new generation of Wilwood performance features. The DynaPro uses
a new 7816 type brake pad that is supported from the top by Quick-Clip pad retainers. This feature eliminates the need for a pad support
step in the bottom of the caliper and adds additional clearance for mounting closer to the hub on small wheel and small rotor applications.
The pad radius matches to rotor diameters between 9.45" (240,0 mm) and 12.19" (309,6 mm), and the caliper fits easily inside many
13.00" wheel applications. The Quick-Clips also accommodate easy pad access without caliper removal. PolyMatrix pad compounds are
available to cover the full range of sport and competition applications. Other new Wilwood features include coated aluminum pistons fitted
with high temperature rubber boots that seal out dirt, moisture, and debris from the piston bores in less than friendly environments.
Every caliper is equipped with Wilwood's SRS stainless steel bridge plates. The 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. Internal fluid passages eliminate the need for external tubes. Four corner
bleed screws assure simple and effective air evacuation from the system and allow one caliper to be mounted in any front, rear, right or
left position.
NOTE: For sustained high temperature operation in severe duty competition, the DynaPro can be fitted with one piece stainless steel or
Wilwood's exclusive Thermlock
®
piston technology without the dust boots. Contact Wilwood or your dealer with requirements.
ORDERING INFORMATION
(1)
:
BORE SIZE DISC WIDTH PART NUMBER
1.75” 44,5 mm 1.00” 25,4 mm 120-7381
1.75” 44,5 mm .81” 20,6 mm 120-7380
1.75” 44,5 mm .38” - .50” 9,7 - 12,7 mm 120-7726
1.75” 44,5 mm 1.00” 25,4 mm 120-8545
(2)
1.75” 44,5 mm .81” 20,6 mm 120-8544
(2)
1.75” 44,5 mm .81” 20,6 mm 120-8544-SI
(2)
1.75” 44,5 mm .38” - .50” 9,7 - 12,7 mm 120-8543
(2)
1.75” 44,5 mm .38” - .50” 9,7 - 12,7 mm 120-8543-SI
(2)
1.62” 41,1 mm 1.00” 25,4 mm 120-7379
(3)
1.62” 41,1 mm .81” 20,6 mm 120-7378
(3)
1.62” 41,1 mm .38” - .50” 9,7 - 12,7 mm 120-7725
1.62” 41,1 mm 1.00” 25,4 mm 120-8542
(2)
1.62” 41,1 mm .81” 20,6 mm 120-8541
(2)
1.62” 41,1 mm .38” - .50” 9,7 - 12,7 mm 120-8540
(2)
1.50” 38,1 mm 1.00” 25,4 mm 120-7328
1.50” 38,1 mm .81” 20,6 mm 120-7327
(3)
1.50” 38,1 mm .38” - .50” 9,7 - 12,7 mm 120-7722
1.38” 35,1 mm 1.00” 25,4 mm 120-7377
1.38” 35,1 mm .81” 20,6 mm 120-7376
(3)
1.38” 35,1 mm .38” - .50” 9,7 - 12,7 mm 120-7724
1.38” 35,1 mm 1.00” 25,4 mm 120-8539
(2)
1.38” 35,1 mm .81” 20,6 mm 120-8538
(2)
1.38” 35,1 mm .38” - .50” 9,7 - 12,7 mm 120-8537
(2)
1.25” 31,8 mm 1.00” 25,4 mm 120-7375
1.25” 31,8 mm .81” 20,6 mm 120-7374
(3)
1.25” 31,8 mm .38” - .50” 9,7 - 12,7 mm 120-7723
1.25” 31,8 mm 1.00” 25,4 mm 120-8536
(2)
1.25” 31,8 mm .81” 20,6 mm 120-8535
(2)
1.25” 31,8 mm .38” - .50” 9,7 - 12,7 mm 120-8534
(2)
NOTES: (1) CALIPER MOUNTING BRACKET KIT 5.98” (152,0) RADIAL TO 3.50” (88,9) LUG MOUNT - P/N: 250-6309
(2) THESE CALIPERS HAVE STAINLESS STEEL PISTONS WITHOUT DUST BOOTS
(3) AVAILABLE RED, ADD”RD” TO END OF PART NUMBER WHEN ORDERING