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I had P0420 & P0430 codes and they replaced both cats under warranty. There is actually a TSB out from Ford for catalytic converter issues on 2018 and early build 2019 Mustangs. Make sure you are running the latest calibration from Roush because there were some issues in earlier calibrations...

Here is a video from Brenspeed on a 2021 Mustang GT Convertible Auto with the Roush Phase 2 kit and no other mods on 93 octane with a drag radial. 648hp 547tq 10.69 1/4 mile @ 129 That’s impressive!

Totally agree if your going to be driving in snowy or icy conditions than a dedicated winter tire is the way to go.

The Michelin Pilot Sport 4AS or AS3+ perform as well or better than most summer performance tires.

Summer setup….. Nitto 555G2 - Front Nitto 555R2 - Rear Cold weather Set Up…. Michelin Pilot Sport AS4 or AS3 + all around

He has a 17 with the 2300 blower.

Beefcake his Roush Phase 2 kit for the 15-17 should have the fuel pump booster included. Hit up Beefcake Racing for your injectors though!

FIC1000H is an excellent injector and retail for $700. See if you can get a deal somewhere or hold out for Black Friday sale prices! I had a 17 with the Roush Phase 2 and custom tune with FIC1000H’s and was a great set up. Your going to enjoy it!

They are correct. You will need to run at a minimum 56lb injectors for pump gas, but your best bet would be FIC1000’s, DW95’s or ID1050X for more headroom and additional power down the road.

Ford will not warranty anything powertrain related even with a Roush supercharger. Roush would have to step up with that type or warranty, and if Roush ever does offer something like that make sure you get that bad boy in writing. You definitely should have received some form of payment...

Gapped at .028-.031

Agreed tire is your most important first step before suspension tweeks. For the street you’ll appreciate the ride and handling of the stock suspension and the dramatic improvement in traction with a Nitto 555R2 on the back.

Nothing will make up for the aggravation and time lost with your car, so hopefully you can finally enjoy it. How bad did you gap the Scat Pack?

Roush is a great street application kit with plenty of power, staying on 91 or 93 octane and a warranty. If that is what you want then Roush is for you, if looking for future big power then go the other systems.

The 18-20’s are dialed in. It’s a shame the issues some people are having on the 21’s. Roush has to hook you up with something sheesh!

Through your dealer. Try to find a Roush authorized dealer if possible who has done installs.

I think you are right regarding the issues on the 21’s might be linked to this. That was still a very unfortunate situation he had to deal with regarding Roush and Tindol.

19 Roush Stage 3

That is my favorite Mustang color too!

Good move. The 17 RS3 is one of the best they made in my opinion. I’m looking at grabbing one to go along with my 19 RS3. Is that grabber blue?