Wilwood W6A Front Caliper and Bracket Upgrade Kit - Manual (Page 3)

General Information, Disassembly and Assembly Instructions
Parts List
•Installation of this kit should ONLY be performed by individuals experienced in the
installation and proper operation of disc brake systems. Prior to any attempt to
install this kit, please check the following to ensure a trouble free installation.
•Inspect the contents of this kit against the parts list to ensure that all
components and hardware are included.
•Make sure this is the correct kit to fit the exact make and model year of your axle
and wheels. This kit is designed for direct bolt-on installation to mount a W6A
caliper, onto a 1997-2012 C5/C6 Corvette spindle, over a 2005-up Z51 factory
replacement rotor. The 2005-up Z51 rotor is 13.4” (340mm) in diameter and 1.25”
thick, and available from nearly all auto parts stores and Corvette performance parts
warehouses. This kit requires a minimum of 17” diameter wheels. NOTE: This kit
does not fit all Corvette wheels. Wheel clearance must be verified using Figure 2.
•Verify your wheel clearance using Figure 2.
Disassembly
• Disassemble the original equipment front brakes:
Raise the front wheels off the ground and support the front suspension
according to the vehicle manufacturer’s instructions.
Remove the front wheels and stock calipers. Save the stock caliper mounting
bracket bolts and washers, they will be utilized during reassembly.
• Remove any nicks or burrs on the upright that may interfere with the installation of
the new brake components.
• Clean and de-grease the caliper mounting bosses and saved components.
Assembly Instructions (numbers in parenthesis refer to the parts list and Figure 1 on the preceding page):
• Install three lug nuts (finger tight) to keep the OE rotor in place while continuing with the installation.
• The caliper mount bracket (1) should initially be installed with clean, dry threads on the mounting bolts. Orient the bracket as shown
in Figure 1, and install using saved OE bolts and washers. Initially place two .029” thick shims (2) on each bolt between the bracket
and upright, Figure 1. Temporarily tighten the mounting bolts. NOTE: The bracket must fit squarely against the mount bosses on the
upright. Inspect for interference from casting irregularities, machining ridges, burrs, etc. Later, after the caliper alignment has been
checked, the mount bolts will be secured using red Loctite
® 271.
CENTER
LINE OF
WHEEL
.50 (12,7)
RADIUS 1.57 (39,9)
3.80 (96,5) .19 (4,8)
4.27
(108,5)
7.82
(198,6)
CALIPER
CORVETTE Z51 ROTOR
WHEEL MOUNT SURFACE
NOTE: A MINIMUM OF .080” CLEARANCE MUST BE MAINTAINED
BETWEEN THE WHEEL AND CALIPER IN ALL AREAS
1.26 (32,0) Z51 ROTOR THICKNESS
2.78 (70,6)
CENTER REGISTRATION
Figure 2. Wheel Clearance Diagram
1
2
3
3A
3B
4
5
6
7
8
2
12
2
2
2
4
4
4
16
1
250-11721
240-8969
120-11663/64-RS
120-11663/64-RSN
120-11663/64-RSR
230-9182
240-11101
230-9080
240-3902
150-9489K Bracket, Caliper Mounting
Shim, .029 Thick
Caliper, W6A (one each, right and left)
Caliper, W6A, Nickel
Caliper, W^A, Red
Nut, 7/16-20, Self-Locking, 12 Point
Washer, .453 I.D. x .750 O.D. x .063 Thick
Stud, 7/16-14 x 7/16-20 x 3.375 long (pre installed in bracket)
Shim, .016 Thick
Pad, BP-20 Compound, Axle Set
ITEM NO. PART NO. DESCRIPTION QTY
NOTES: Part Number 250-11720 Caliper Mounting Bracket Kit, includes part numbers 250-11721, 230-9080, 230-9182, 240-3902, 240-11101,
240-8969 and 300-10827 (not used)
Wilwood offers an optional Braided Stainless Steel Hose Kit. Order part number 220-8176 (C-5) or 220-9100 (C-6) (not included in kit)
Item 3A is an optional item available in the “-N” nickel caliper kit. Add “-N” to end of part number when ordering.
Item 3B is an optional item available in the “-R” red caliper kit. Add “-R” to end of part number when ordering.
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