For some reason, www.r4i-gold.com is apt to get down recently. Users get troubled to download their latest firmware patch and kernel for R4i-Gold & R4 Gold Pro. Below firmware patch and kernel are those downloaded from r4i-gold.com as a supplementary.
As narrated at R4i Gold page, flashcarts from this company have developed from DSi series, 3DS series and Pro series. The former two series have been out of production, and their kernel is still available at r4i-gold.com.
Below firmware and kernel are to be used for R4 Gold Pro only.
3DSV6.0 - This patch can only be used for R4 gold pro 2013 version, others will get a white screen after update, and you can revert the firmware to V4.5 to fix the white screen problem.
3DSV4.5 - Patch for 3DS 4.5.0-10 and DSi 1.4.5.
Wood v1.60 - This wood kernel is not written by Yellow Wood Goblin, but r4i-gold.com team instead.
Update Video Guide
Update r4 gold pro 2013 firmware for 3DS 6.0/6.1