If you plan on spraying more than 100hp (4ea. 26jets) , then I would invest in some rods. Your stock head will flow the necessary air so head work isn't really needed. I would however install an intake cam in the exhaust side (use 2 intake cams) and install adjustable cam sprockets from APE. Then get yourself a manual cam chain tensioner and dump the stock one. Either tune your ECU or install a Power Commander for extra fuel with an A/F of about 11 to 11.5 Then only use C-16 for your tune up (123octane) . I personally would use an MPS Spyder spray bar unit from MPS Racing, but that's just a personal thing. Modify your air box, adjust your cams 104/106, take out about 12 degrees of timing. That should give you a safe lethargic place to start your tune up. Remember, go fast fat and live to race another day. You may need to up your fuel pressure to get the needed fuel from your stock injectors. Now that you want to play with the big jets, be prepared to start burning things up. It's just part of the game with big nitrous jets.
When I started playing above 100hp jetting, burning up motors was becoming an annual event. I burned up 7 motors in 4 years to get a good 200 HP tuneup that would hold for an entire mile. That's 18 seconds of nitrous and if you don't think that's a long time, look at your watch start hissing for 18 seconds.
You may also want to invest in progressive controller to sat with a smaller hit upon starting your nitrous. A 100 HP tuneup hit all at the sometime is quite a shock to a motor.
,,, i have a 2008 Gen II with Akrapovic full system and PCV.
