My first lift was a set of Tundra TRD coils.
Make sure that you get the color code from him first (paint dots on the coils), Tundra TRD Coils. Left, 48131-AF100 (Yellow/Yellow). Right, 48131-AF090 (Blue/Yellow)
The TRD coils fit:
4wd, access cab, w/off road pkg. 2000 - 2002
2wd Access cab 2003 - 2004
4wd Access cab Left 2003 - 2004
Depending on the year of the 4runner (some years sat higher) you will get
1.5"-2"+.
They are about a 575#-595# spring rate.
The ToyTec COs are usually a 600# SR. This is what I'm running right now. They are real close to the same ride.