Silver37

Anyone know the diameter of the brake piston on a S model (sedan) with 4 pistons? I'm wanting to try the Nu-Lok Piston Cushions from NAPA, and they don't have a direct cross reference, but I'm sure I could match one if I can find the diameter. Any help would be appreciated!

MalbecG37S

I'm assuming you looked here by now?: 2012 Infiniti G25 and G37 Sedan Specs and Options | Infiniti USA Official Site

In case you are 'click challenged' here you go: Aluminum 4-piston opposed front calipers with 14.0 x 1.3-inch ventilated discs/2-piston opposed rear calipers with 13.8 x 0.8-inch ventilated discs; 4-wheel, 4-channel ABS

Good Luck.

JSolo

iTrader: (14)

MalbecG37S, reread the OP's query. He's not asking for rotor diameter. He's asking about PISTON diameter.

MalbecG37S

You are correct - I mis-read. Was wondering why no one had answered

The piston diameter is a bit elusive....

Thx

soundmike

iTrader: (6)

Front brake
Cylinder bore diameter
41.3 (1.626) × 2 + 44.45 (1.750) × 2

Pad length × width × thickness
123.2 × 55.0 × 11.0 (4.85 × 2.165 × 0.433)

Rotor outer diameter × thickness
355 × 32.0 (13.98 × 1.260)

Rear brake
Cylinder bore diameter
41.3 (1.626) × 2

Pad length × width × thickness
95.8 × 41.5 × 9.5 (3.772 × 1.634 × 0.374)

Rotor outer diameter × thickness
350 × 20.0 (13.78 × 0.787)

Master cylinder Cylinder bore diameter
25.4 (1)

Control valve Valve type
Electric brake force distribution

Brake booster Diaphragm diameter
Primary: 230 (9)
Secondary: 205 (8)



Recommended brake fluid DOT 3