Mods needed to support 550 WHP Centrifugal SC kit

Jayhovah

got a couple of notes from your list (all of it IMO) -

Return fuel system: You may as well just remove the AAM RFS from your list completely as it does not include an external filter, which you will want for E85 and Walbro 485.

The S1.SE is also overkill for the power you are looking for. The S1.E and FAST-500E are the appropriate choices.

Clutch: You can save a chunk by going with the Z1 clutch. I have it and it works great. You may also consider sticking with the OEM flywheel... I kind of wish I had (I got talked into the light weight flywheel by members here). I don't see much benefit, but I do hear a lot more drivetrain chatter.

Exhaust: LTH is an expensive addition that is probably not going to buy you much more performance - not to mention it is laborious to install. It is currently occupying 11% of the total cost in the way you have it configured.

Tune: You will need the 4 bar sensor in addition to the one for your gauge (which will be just for your gauge).

Oil cooling: If your car is not equipped with the OEM cooler, you will need to add one. Even stock cars without the OEM cooler probably need to add on. If you have the OEM cooler, I would take a wait-and-see approach and add it if necessary.
The oil pan spacer is only going to give you additional capacity. Air external oil cooler will also do this... I would skip the spacer.

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2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted

Senna-F1

I don't think I ever had the cooler and spacer checked, at least I meant to just have 1 checked.

I assume my '14 Nismo has an OE cooler. The thought behind the spacer was this. This one increases capacity by 1 Liter. That's an increase of 20%. So, oil should be 20% cleaner between intervals. And with E85, injecting 25% - 33% more fuel, on top of the fact I'm boosting (ever more fuel), could cause some fuel contamination / "bore wash". It should also be 20% more resistant to increasing in temperature. It *may* not effect the ultimate temperature, but it should take longer to reach that point. For now Im thinking spacer, and see what happens. Im already planning to change oil every 3333 miles if I do this. Also, it's only $130 right now. Black Friday might change some of these prices. The down side is, if I end up with a cooler too, I just spent $130 I didn't need to because I agree I don't need both.

Jayhovah

Logic seems sound to me. =) You should have the OEM cooler since you are '14.

__________________
2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted