Raw Vintage Spring Set

I bought this set for my strat cause I wanna use 5 springs and handle the tremolo arm. The stock fender springs are too stiff.
I did not notice any change in the sound.

I have tried these springs with my ABM 5050-S Vintage Tremolo.
Indeed the tension is lower than the ABM springs and yes they do sound different, softer / warmer maybe?
In the end I preferred the original ABM springs.

They change tone... in my case they made my slightly to mellow/warm strat even mellower, almost muddy, Nothing to complain about quality, they are softer steel than usual fender springs, so you need to use more of them, in my case all 5. They can be great if you need to tame harshness/brittleness or slightly soften attack, In my case I tried them and went back to original Fender springs.

I was on the verge of sending these back, until I "accidentally" did a double-blind test to prove that I couldn't tell the difference. I realized I had my headphones reversed and had actually chosen the "after" recordings as sounding better. Subtle difference from stock, but an improvement.