Well how often do springs need to be changed. Obviously there are a ton of variables but i dont know
ECS Novi 1500 supercharger, tsp 2" longtubes, zl1 fuel pump, adm fpcm, id850s, aem meth kit, mcloed rxt, 17" weld rts, 4.5" M&H skinnies, 325 M&H rear. 600rwhp mustang dyno.
Waiting to install- fsp cam kit