Viper Primary Spring, 62gr DPYR Dalton Weights with 2 grams in the middle hole, Dalton 54/42 R helix, and the SECRET is a Dalton BLACK secondary spring. They dont list it on their site, but will sell it to you.
I ran this on my 05 RX-1 that I swapped to a Warrior (136 ProAction Skid, 1.375 Paddle track) and the sled would pull upper 120s on and accelerate HARD.
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