worth it to get a tune with no mods?

JARblue

But spending $1500 on intake and exhaust plus $800 for a tune and getting at most 30 hp (10%) improvement is worth it?!?

You're an idiot. The throttle response is more improvement than the hp gain. Even if you have bolt-ons. And if you are stock, you will still get some performance gain - which will be just as noticeable as the hp bump by tuning with intake and exhaust, that is, negligible.

A stock car spending $800 on a tune gives a better value as far as driving experience results vs $2000+ for intakes and tune with virtually the same results in terms of real world experience.

Now if you need to stroke your ego with that extra 20-30 hp on a dyno graph, then by all means. Have fun. But don't suggest that a tune on a fully stock Z is a waste of money.

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