seriously. after use ts vs, wat i can feel is :

quieter egine
fc improve abit
gear feel smooth n more aclrte (old 2008 car..heh)
in term of aircond, not much effect (prbly bcoz of my ac still cold even bfre use tis vs)
for sound system, not much difrent (probly bcoz stock hu n speaker)

overall. no rgret at all. defntly recomnded.
good job ts.