Hey guys, i'm new here so hopefully this thread is in the right place. I recently bought a 2006 Altima SE. I love the VQ35 by the way! It has 225,000 miles. Normally i wouldnt by something with that high of miles but i needed something cheap and it was in imaculate shape. It had 60+ service records in Carfax all done at the dealer so i figured it was safe. 6 montgs down and so far so good. Since it had high miles i want to do some maintenance to make sure it lasts a lot longer. I am planning on tearing her apart to check valve clearance and replace some shims if needed. According to Carfax this has never been done. Its not knocking but there is a really faint valve noise so i figured i might as well check them. Anyways, my question is, while i have it opened up, is there anything else i should replace while i am in there, either for longevity reasons or for some added performance? Im not looking to spend $1200 to replace my cams but a couple hundred would be ok. Maybe new valves or springs, etc. Also, i have heard this engine is starved for air due to the intake design. Is that because the cold air intake or is it more the intake manifold? I figured i would do the intake at the same time as the valves but am wondering if i should replace the manifold or just do a CIA? Thanks for all your help!