AirPort Extreme Wifi Card Firmware Updates

I have a mac pro 3,1 and a mac pro 2,1. My mac pro 3,1 did not have a airport card installed so i took the one out of my 2,1 and it worked fine. The only issue is for some reason it says it only has 802.11 a/b/g support. I have done research and it says it had 802.11 n support as well but mine does not. I think mine may have a old firmware version installed that limits it to a/b/g support but i cant find anywhere to get the updates. Any help would be nice :D. Here are the specs of my mac and the airport card:

AIRPORT:

Card Type: AirPort Extreme (0x14E4, 0x89)

Firmware Version: Broadcom BCM43xx 1.0 (5.10.131.36.16)

MAC Address: 00:14:51:e8:25:07

Locale: FCC

Country Code: US

Supported PHY Modes: 802.11 a/b/g

Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165

Status: Connected

MAC:

Model Name: Mac Pro

Model Identifier: MacPro3,1

Processor Name: Quad-Core Intel Xeon

Processor Speed: 3.2 GHz

Number of Processors: 2

Total Number of Cores: 8

L2 Cache (per Processor): 12 MB

Memory: 32 GB

Bus Speed: 1.6 GHz

Boot ROM Version: MP31.006C.B05

SMC Version (system): 1.25f4

Serial Number (system): G88293DPXYL

Hardware UUID: AA8136A1-9FB8-509D-96CE-1C3C6051D12B