Originally posted by BP:
Originally posted by JCSVT:
He means bottom-end as in engine block, connecting rods, and pistons. You can only go but so far with F/I on the VQ35.
true. however there's a couple NA VQs that run mid 13s with just i/h/e (<$1k). and that's an auto. 
good luck selling your car sigma. looks like it's been well maintained and the mods are useful/tasteful. i'm sure someone will pay your asking price.
A few guys over on my350z.com are running really low 13's with only basic bolt-ons. One guy on slicks w/o headers and cams is running 13.1@107MPH. I think he'll break 12's soon with the right weather and conditions.
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