4 Runner Stereo Upgrade . I also installed it with the OEM Audio Plus Reference. This is where I use crutchfield.com to find what fits in my dash. Front Speakers - upgrade - Page 2 - Toyota 4Runner Forum ... (Jeffrey Norris) Transfer over your build thread from a different forum to this one. This is where I use crutchfield.com to find what fits in my dash. The ReCurve EZQ sound processor is generally used in higher end audio systems, while our plug and play EZAMPS are. This is where I use crutchfield.com to find what fits in my dash. I'm aware of the tundra upgrade, the limited already has larger brakes, so I'll probably save my money on the tundra parts. Toyota 4Runner How to remove the stock stereo head unit ... 5th Gen 4Runner Audio Upgrades - The Complete Audio System ... Radio Upgrades... Let see them. - Page 24 - Toyota