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Message: [QUOTE="superpsd, post: 1467074, member: 15821"] The stock hpop may not keep up on hotter tunes. In that case you will have to upgrade. You can try it out and see if it supplies enough to keep the injectors fed. If ICP is low you won't hurt anything. You can hurt the injectors with low fuel pressure. That is why many go with hybrids as they use less high pressure oil. Head studs and valve springs are good insurance items. Typically not needed under 400hp. Some have put down 500+ with stock headbolts but it comes down to tuning at that point. Cross the cylinder pressure threshold and somethinga going to give. Valve springs have a lot to do with backpressure and spinning the engine harder. You can run the stock charger but it may be a little dirty on hot tunes. Many have ran the stock charger to the 400hp level many times. Plan on an upgrade someday. Watch the new KC turbos that are coming out based on the S300 sized chargers. If you have not plan to upgrade to a stronger clutch. I roasted a stock level single mass flywheel clutch in no time and I am only running a mechanical fuel pump with 350/200s detuned so not likely even 400hp. [/QUOTE]

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