I am doing research right now, and I had a question pop up that I was wondering if you guys could cover. Now with an LS1 engine, you have your peeps out there that are running some pretty decent streetable times with bolt ons. (F.T.R.A., Lid, Throttle body, pulley kit, etc etc) It is not uncommon to see a 10-13 HP increase respectivly for each of these bolt ons. This is on a completly stock engine. My question is that that if you were to put a head/cam package on a base LS1 engine, (or even just a cam package), will the engine see the same substantial gain from bolt ons in its modded phase, or will the power derived from these go down proportionally to the extra power that is being exerted from the engine itself. It would seem that 10 HP from a bolt before a head/cam package is a deal, but if you only pull 1/3 or even 1/2 that power after power is added to the engine itself, is the bolt on even still worth the $$$?