You can't have PPE LTH and [HFC or TPs] at the same time. All cats are deleted once LTH are installed. You would have to order short tube headers if you want [HFC or TPs].
You shouldn't get a SES/check engine light with a tune. But you will get one without a tune.
IIRC, the manufacturer of PPE headers dynoed gains at 50 hp (not rear wheel hp).
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'13 370Z Midnight Blue 6MT / Touring Sport w/nav / PPE Long Tube Racing Headers / FI TDX 10" Resonator w/CF mufflers / K&N Drop-Ins / ZSpeed Underbody Shroud v2 / DRL 'always on' Mod
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