From what Chris Hill said, the Walbro400 doesn't have the same whine the 255 did. Debating between the Wally400 or the Aero340. If you're wanting to upgrade to E85, make sure that you use lines that are safe with E85. There are numerous choices if you want to make your own or buy from a vendor. IPS also made replacement fuel pumps hats as I recall that even had the AN fitting already built in, and somebody else did a guide on how to modify yours to make it work as well if your fuel pump hat is still in good shape.
Flashable ECUs are definitely a big improvement. Basically as far as versatility and capability it's between a full on Standalone and Piggybacks. Greg is working to change that, and for most street cars, the Flashable ECUs is pretty much good as it gets it seems. EVO guys have been using them for years.
As far as the coilovers, Jfast's thread is here. It is an excellent and informative read. I think his finally choices are around the last page or two with brand and rates and what not. he went with used Evo coilovers and had them redone to meet his goals.
Beyond that, Dynamic Racing's Dr650 and DR750 turbos are pretty much all the power most folks could want and they're TD04 with great spool and big HP.
Not sure how much smaller you could make the radiator, I recall somebody did something with theirs and angled it forwards a little bit or something which gave better clearance with minimal losses. The factory radiators are really quite good, and have good space savings when paired with 2 factory driver side fans. I think most of the aftermarket radiators tend to be thicker, not thinner.
I think GZP has most of the poly bushings for the front end, and PMP has solid bushings for the rear diff. Brakes have a few more options and people have done some different custom things like GT500 brakes and what not, although 2g calipers with better pads, fluids and braided lines is still a very competent choice.
There was a discovery that aftermarket cams have been made wrong for the platform for years, Pampena worked with BC to get new cams made that should be better, there should be results before too long.
If you're looking for cosmetic stuff:
Replacement seat skins mean the interior is easily fixed up if yours has cracked or worn seats. Can't recall who does those off hand
Most aftermarket bumpers continue to suck. Cianci still produces pieces although opinion is split on them, GZP carries them and says that the quality is back up to what it previously was.




i'd also just go to dual feed rails, rather than loop it--but that's personal preference.
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