And it made the LS1 put out 320 not more then 360... Intake is a bolt on, yes. My point is you can't take the "bolt on's" off the LS2 motor, bolt them in an LS1 and get the same numbers. To get 50+hp outcome from a bolt on you'll need NO2. LOL
In 01-02 Fbodies were frankencars anyway because they were phasing out. GM did not put anyting other then LS1's in fbodies, BUT you can find some with the LS6 blocks almost all of them had the LS6 intakes from the factory, still rated at factory hp. Your friends car being a '00 model, it's all LS1.
Bolt on's. Where does the line stop per person on what's considered bolt on and what's considered engine upgrade? LOL Swapping 243 heads on a LS1 a bolt on? I always consider "bolt on's" as CAI/HAI, exhaust, pulleys, NO2, "simple" stuff.... intakes and TB's on the LS motors are pretty simple to swap around.
And I'm playing nice, I might learn something new!!! LOL