Four pistons or six?
Wilwood 140-7675-DR is the red four-piston Forged Dynalite front-hub kit with 12.19-inch drilled and slotted rotors and BP-10 pads. It covers similar GM and Ridetech spindle applications to the Dynapro 6 kits, but the calipers are different.
Match the application
Follow the manufacturer’s exact vehicle/trim/spindle row. The listing separates factory-disc, factory-drum and Ridetech Pin Spindle configurations; Ford/Mercury rows require those listed Ridetech spindles. Factory All/Base rows do not establish fit for unrelated drop spindles.
What comes in the kit
Red powder-coated Forged Dynalite four-piston calipers, 12.19 x 0.81-inch iron SRP drilled/slotted rotors with black electrocoat, and a BP-10 pad axle set.
The hub kit includes the listed hubs, rotor adapters, mounting brackets, bearing cones, grease seals, spindle washers, dust caps/O-rings, wheel studs and assembly/shim hardware. Check the actual box against the instruction-sheet parts list; caliper/rotor finish options are not all included at once.
Hubs provide 5 x 4.50-inch and 5 x 4.75-inch bolt circles with 1/2-20 studs. Choose the pattern that matches the wheels.
Before it leaves the bench
On some original spindles, DS-448 calls for anchor-hole drilling/tapping and a 0.50-inch lower spindle/steering-arm hole. Use a qualified machinist for required work. Verify bracket orientation against steering-arm clearance and use the specified disc-spindle spacer/longer upper bolt where applicable.
The hub offset moves each wheel 0.19 inch outward. Recheck tire/fender clearance and wheel position on both sides.
Some 15-inch wheels may fit, but diameter alone is insufficient. Use the exact wheel-clearance template and maintain at least 0.080 inch between wheel and caliper everywhere.
Wheel contact surfaces must seat completely on the hub face. Overhanging contact surfaces require separate 300-11961 steel spacers (6.60-inch diameter x 0.20-inch thick). For stamped-steel wheels without overhang, Wilwood recommends separate 300-10716 hub shields (6.15-inch diameter x 0.09-inch thick).
Flexlines are not included and OEM lines will not adapt to these calipers. Wilwood lists separate front line kit 220-7056; verify routing and suspension/steering clearance. Retain suitable OE spindle nuts/nut locks and supply new spindle cotter pins, which are not included.
Check bracket/caliper alignment, full bolt engagement through clinch nuts, bearing adjustment and wheel seating. Have an experienced brake installer confirm the master-cylinder/brake-bias combination, then bleed, bed and test the system before road use. These are traditional non-ABS spindle applications; ABS compatibility is not asserted.
Exact vehicle and spindle application table
Assembly instructions and wheel-clearance template
If you run a shop, I can drop-ship this straight to you, anywhere.
