Originally Posted by cward

Not talking about the heads, just the IH's and plenuum. Should be less than $1000.00 and you should gain rwhp. Have you had your Z on a Dyno? Like I said, with your mods and with the porting on the intake side you should be at around 400 rwhp SAE. I can feel that you are asking yourself, how much hp gain. It depends on what you have now and how restricted your air intake is now. Since you have a '93 you might even be above 400 as your heads will flow a little better than the older heads. Porting the heads is expensive. I did not port my heads on my '91 and it ran pretty good on the street, strip and track.

Curtis