Editing Camshaft (section)

==Aftermarket camshafts==

Camshafts which are still fairly mild (stage 1 or 2) are able to be run by the existing ECCS computer without any modifications.
More aggressive camshafts will require machining of the lifter housings, and some kind of computer modification to get the most out of the camshaft by either replacing the program chip with a reprogrammed type for that camshaft, or replacing the computer with an aftermarket one.
Obviously the second option is going to be more expensive but gives you the option to retune your system.
Note that when replacing your camshaft you will either need to replace the lifters (of which there are 12, costing up to $70 each from [[Nissan]]) or get them reground, due to the different wearing with the old camshaft.
This can increase costs significantly on top of a cam and chip package.