CobraMarty
NAXJA Forum User
- Location
- PM me any questions
I have read most all of the threads on this site and on others, about this topic of Front 'Big Brakes and have found much information.
Early XJ- 84-89 XJ have the 'old' style knuckle with 2 large mounting lugs for the caliper and brackets to bolt onto, 11" rotors single piston calipers
Later XJ- '90+ XJ with the 'New' style knuckle has the 2 small caliper mounting tabs and the 'wings' for the pads to ride on. 11" rotors single piston calipers. These small caliper mounting lugs are not strong enough to support calipers only. These are the knuckles used and modified by VANCO in their kits.
WJ Knuckles '93-98 12" rotors dual piston calipers 5x4.5 pattern. These can and have been used by many as an upgrade but requires different/modified steering and track bar modification as well as welding on a spacer to the knuckles. Can't just use the lower steering bracket because it will cause significant bumpsteer because it is 3/4"-1" lower than stock XJ. Gets expensive when include the steering and track bar mods.
Australia Co- used Ford calipers and 12" rotors which bolted on to 'early/old' style knuckles. Middle price but expensive with shipping.
Boostwerks- uses 12" rotors and wilwood 4 piston calipers bolted to 'early/old' style knuckles. Expensive, $850-$900, ? if still available.
VANCO- uses 'newer/late' style knuckles that they modify by cutting off the brake pad brackets and caliper brackets and drill and tap the knuckle for 2 additional bolts and uses special adapter brackets. Requires exchange of knuckles. 12" rotors and dual piston calipers, $950-$1050. Have a 13" rotor kit with bigger calipers and more expensive $1500+ and requires 17"+ wheels.
Custom- where special fab and machine skills to use ford, dodge, other spindles, rotors, calipers, different bolt patterns and steering, $$$
Other/Mustang parts- using 'Cobra' calipers dual piston and 13" rotors or using 2014 Mustang GT 13.2" rotors and dual piston calipers. These will require bigger 17"+ wheels. These calipers have the bracket attached and require the strong 'early' XJ knuckles or modify and drill and tap the newer XJ knuckles. To modify the 'newer' knuckles they must be removed and at that point you might as well just replace them with used or new Crown 'early' knuckles.
Any additional options and ideas?
Early XJ- 84-89 XJ have the 'old' style knuckle with 2 large mounting lugs for the caliper and brackets to bolt onto, 11" rotors single piston calipers
Later XJ- '90+ XJ with the 'New' style knuckle has the 2 small caliper mounting tabs and the 'wings' for the pads to ride on. 11" rotors single piston calipers. These small caliper mounting lugs are not strong enough to support calipers only. These are the knuckles used and modified by VANCO in their kits.
WJ Knuckles '93-98 12" rotors dual piston calipers 5x4.5 pattern. These can and have been used by many as an upgrade but requires different/modified steering and track bar modification as well as welding on a spacer to the knuckles. Can't just use the lower steering bracket because it will cause significant bumpsteer because it is 3/4"-1" lower than stock XJ. Gets expensive when include the steering and track bar mods.
Australia Co- used Ford calipers and 12" rotors which bolted on to 'early/old' style knuckles. Middle price but expensive with shipping.
Boostwerks- uses 12" rotors and wilwood 4 piston calipers bolted to 'early/old' style knuckles. Expensive, $850-$900, ? if still available.
VANCO- uses 'newer/late' style knuckles that they modify by cutting off the brake pad brackets and caliper brackets and drill and tap the knuckle for 2 additional bolts and uses special adapter brackets. Requires exchange of knuckles. 12" rotors and dual piston calipers, $950-$1050. Have a 13" rotor kit with bigger calipers and more expensive $1500+ and requires 17"+ wheels.
Custom- where special fab and machine skills to use ford, dodge, other spindles, rotors, calipers, different bolt patterns and steering, $$$
Other/Mustang parts- using 'Cobra' calipers dual piston and 13" rotors or using 2014 Mustang GT 13.2" rotors and dual piston calipers. These will require bigger 17"+ wheels. These calipers have the bracket attached and require the strong 'early' XJ knuckles or modify and drill and tap the newer XJ knuckles. To modify the 'newer' knuckles they must be removed and at that point you might as well just replace them with used or new Crown 'early' knuckles.
Any additional options and ideas?
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