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Pp1 are 19 inches. Ps4s are 275/40/19. E85 only should only make 430 to 440whp.

None. Only e85. Pp1

Tested in 78 degree weather. 27 to 28 psi after 20 minutes of driving. It still fish tails on drag mode and adv track off. This is on ps4s 275/40/19. More likely will be getting either 555r2 or new wheels with MT street R. Just thought I give you an update you.

305 should hook fine from what I've read in forums

Sounds good. Thanks!

Are you auto or mt82? the only issue i have for the ps4s is when the 10r80 shift from 2nd to 3rd. WOT during 2nd at 40 roll grip just fine.

Yeah if I don't get a official answer for the 275/40/19 nitto 555r2. Imma just grab 17 inch wheels and grab MT. Safer cause I know MT will grip for sure.

I read and youtube show 555r2 can be driven in rain. But yes waiting on someone with 275/40/r19 555r2 to chime in. I see a lot of 305/45/17 thread and proven it grips on boosted mustangs, but haven't read anyone on 275/40/19.

If I go MT. I am 99% buying race stars or VMS wheels so I can swap them out. The pp1 for weekend and MT for Mexico nights. If nitto 555r2 275/40/r19 doesn't slip. I'll just buy the nitto 555r2 only and skip the MT. Hopefully I make sense.

Yeah only aiming to go straight line from a 40 roll. Just don't want to waste 1k on Nitto 555r2 to find out i will still fish tail from 2nd to 3rd shift on a 10r80.

I can't do that. if Nitto 555r2 will not make a difference then i will have to go with MT street R with race starts or vms wheels. Was hoping i can stick with stock pp1 wheels with Nitto 555r2. i need that grip for mexico nights :P

Currently it's on 30psi. I will try 28, 25 and let you know soon.

I've read a lot of threads and getting mix answers. I have a 2020 Mustang GT 10r80, pp1, e85 only with 10k miles. Still has a lot of life on the PS4s. 40 roll 2nd to 3rd it would fish tail hard. I read on forums that the ps4s performs really good, but to my experience it's not gripping at...

Damn thats probably why. Too much power aha

How much power you put down to the wheels?

a10 or mt82? also were you hitting rev limiter?

Only if it was a10 i would've flew out and picked this up before i got my 2020. i bet if it was a a10 it would sell asap.

😍😍😍😍😍

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I buy this in a heart beat if i had money. Did you not have a prochargers on this previously? was eyeing this for a while since it had a centrifugal supercharger.