Just Cruise

Should i just get the original heads with new valve guides and valves or should i spend more and like a afr set of heads instead. Since its gonna be coming apart whats the best way to spend the money. Thanks guys.

Mordeth

Literally thousands of posts on this in the Z06 forum. All the information you could possibly ask for is sitting right there, waiting for you to read it. You won't find much here in the general forum. My advice is to ship them to AHP (American Heritage Performance). Well respected vendor that has done hundreds and hundreds and hundreds of LS7 heads. They will inspect/polish the intake valves, replace the exhaust valves, replace the guides with powdered metal or Moldstar 90 (your choice), replace the seals and locks, resurface, and send you back your heads shiny, repaired and ready to re-install. If you don't want to wait, then you can simply buy them already fixed and send back your core for a core refund, net price is the same.

itomh

Exactly what he said! I also went with AHP. If you plan on just wanting a simple head fix this would be the way to go. however, some upgrades like milling, porting will cause you to have to have car tuned. Simple head fix doesn't require a tune. I you plan on getting a tune, then this would be a great time to consider headers and intake, while you have it apart. I opted for package 4, milled heads .020 and street porting, milling .020 was a free of charge, street porting cost $. Since porting would need a tune, I added B&B headers. So what are your future plans and go from there? If you are not interested in extra HP or exhaust sound, just get the package 4 and be done with it.

99Hawk262

Agree with both of the above posts. Call Kohle or Jake at AHP and talk to them about your goals. They're fantastic to deal with. If you've got basic tools, the swap is very easy and straightforward, and they sell an install kit that has everything you need. DIY saves a lot of money, and allows you to spend some quality time with your ride!

mkitt27

I did this, used the core exchange to speed the process and I had a shop do the work. I did basic pkg 4 but with new springs.