Well how often do springs need to be changed. Obviously there are a ton of variables but i dont know
ECS Novi 1500 supercharger, FSP cam, Tsp 2" longtubes, ZL1 fuel pump, Adm fpcm, Id850s, Aem meth, Mcleod rxt, ZL1 3.73 diff, BMR suspension, 17" weld rts, 4.5" M&H skinnies, 305 MT ET street R rears. 650rwhp mustang dyno. 10.93@125 1.6 60'-before cam.