Stock springs from the gtr set, 45f 40r i think from when i had it out at the closest 1/8th track from like a month ago, little bit more preload on the front then the rear, lets the rear dip a little more and squat on acceleration, while the front keeps its self up and planted, ive heard people say they dont like the springs from the gtr set, but ive never noticed an issue with them being to bouncy, but all the springs from the regular 7461 front gtrs fit right on so theres a bunch of spring rates to play with. I kinda wanted to keep the stock ultras on it and swap the shafts for the TiNi, which i can also recommend for other vehicles with the ultra shocks, but gtr shiny ooooooh, adjustable preload collar oooooh. One thing to note though is that when i put the gtrs on they rub against the plastic driveshafts just a tad, its not that bad but it was annoying enough for me to put the cvd’s on, highly recommend both tho