Brake Caliper - Lexus LFA Owner's Manual

Brake caliper

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The LFA features front 6-piston and rear
4-piston aluminum alloy monoblock
calipers with differential piston bore
sizing. This design takes advantage of
what is known as the 'self-servo effect',
allowing pressure from the unequally
sized pistons to push the pad against the
rotor in a progressive pattern, with the
leading piston applying the least force
and the trailing edge applying the most.
This wedge shape uses the rotational
movement of the disc to help the brake
pads 'bite' into the disc with more
effective pressure distribution, optimized
pressure equalization that helps realize
a more consistent supply of stopping
power. The LFA also features track-bred brake cooling ducts in the front bumper and
aerodynamic under covers designed to channel fresh, cool air to the brake system.
Front brake caliper
1.10 in.
(28 mm)
1.18 in.
(30 mm)
Rear brake caliper
The shape of the cooling ducts in the
front bumper and contours of the under
covers have been designed to direct
cool air directly at the brake discs.
Each brake caliper piston (Front: 12
Rear: 8) employs a thermally insulated
aluminum construction with cooling
holes to help prevent the brake fluid from
boiling for enhanced high-temperature
1.50 in. (38 mm)
endurance.
1.26 in. (32 mm)
1.10 in. (28 mm)
Aluminum brake caliper
piston
Parking brake calipers have been adopted
in order to lower vehicle weight. A switch-
operated EPB (Electric Parking Brake)
function has been adopted.
52
Brake pad side
Thermally insulated
c o n s t r u c t i o n w i t h
cooling holes