I didn't know that all tundra TRD springs were progressive but those pictured aren't what I have in mind of a true progressive spring. What I have in mind of a progressive rate spring is a spring with more tightly wound coils at the top.
My tundra coils are yellow/red and blue/red. I confirmed with the seller twice that they came off of a 4x4 TRD edition, 06 I believe. And they came with the OEM bilsteins labeled with Bilstein/Toyota. As far as I know the Bilsteins only came stock on TRD editions, correct? So Im just wondering why my coils are coded differently. They gave around 2" of lift and ride great.
I have the same ones. I pulled them off of a 2005 TRD Access Cab. The ride is OK. Pretty balanced with my OME 890's.
does the y/y or y/b go on the driver side when installing?