what makes the 07 Zs have 20 more hp than the older Zs?
#1
what makes the 07 Zs have 20 more hp than the older Zs?
just curious. probably getting an '03 Touring, but i just wanted to know why the newer Zs are more powerful and if I can get an '03 to that power without tuning it a lot. perhaps maybe an exhaust system, k&n air filters, etc.
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