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  1. Added JBX Carrier bearing and have vibration now at highway speeds

    Highway-speed vibration is not normal after installing the JXB Performance Driveshaft Support Carrier Bearing.
  2. What did you do to your S550 Mustang today?!

    Washed and Waxed it today
  3. Whipple coolant leak?

    The 5/16" overnight drop without starting the car confirms fluid is actively escaping..
  4. What kind of gas mileage are you getting?

    I'm actually getting around 12-14 L/100km (17-19 MPG) on my daily runs. Your 11.4 L/100km is impressive for a GT with 3.73 gears.
  5. What phone mount are you guys using?

    I use same too, real solid and nice.
  6. 2026-2027 Darkhorse SC Allocation and orders.

    You are not necessarily out of luck, but you are at the mercy of Ford's strict tiering system.Every Ford dealer that enrolled in the Dark Horse SC program and paid the entry fee is guaranteed at least one base allocation. However, Ford determines the exact level—Base, Track Pack, or Track Pack...
  7. A/C Acting Weird

    You Mustang prolly has a failing HVAC mode door actuator.
  8. Shelby GT500 Toggle Switches into S550

    You can, but making them work requires extensive custom rewriting of the car's computer data and matching the underlying wiring.
  9. Holley low ram on street car

    Both the Holley Ultra Lo-Ram and the Ford Performance Cobra Jet manifolds are designed for high-RPM power, which means they trade off some low-end performance for massive top-end gains.
  10. 6R80 fluid change

    Yes, you need to be concerned because precise fluid level is critical for the 10R80 transmission in your Mustang. Being off by even half a liter can cause major issues.
  11. Aftermarket cowl hood options for the S550 mustang

    No major aftermarket company mass-produces a standard catalog hood taller than 4 inches for the 2018+ S550 Mustang.
  12. I needs some information plz

    Yes, there is no specific all-in-one plug-and-play T-harness kit for the rear deck speakers, so you will need to manually splice or use Posi-Tap connectors.
  13. Do lowering springs =track only with the handling package splitters? Different splitter =more performance and durablity?

    Lowering your Mach 1 with the Handling Package will absolutely make street driving much more challenging. If you are already scraping at stock height, dropping the car will make your splitter problems significantly worse.
  14. Brake pad questions

    In terms of Thickness: Replace track pads at 3–4 mm of friction material remaining. Do not start a 20-minute session with less than 5 mm, as they will wear significantly faster under heavy braking. And for the G-Loc Compound: Go with the R10 or R12. The R10 is ideal for intermediate drivers on...
  15. |Help| Car keeps dying on idle

    Based on the aggressive mod list and the mechanics of the 5.0L.Code P050A means the car is struggling with Cold Start Idle Air Control. The engine's computer wants a specific amount of air and fuel to warm up, but it isn't getting it. Because you changed the battery, the car's computer lost its...
  16. What is your regular diff oil temp? (Mach 1 only)

    Regular street and highway driving typically results in a differential oil temperature ranging from 170°F to 215°F. During extended or spirited canyon runs, it's common to see it climb to 225°F to 235°F If the car is hitting sustained temperatures over 240°F - 250°F on a road course, it...
  17. My 2019 GT350 won’t pass emissions testing in Utah

    IMO , If an ECU flash and 1,000+ miles of driving haven't set the O2 readiness monitors, the vehicle likely has a disabled monitor in a custom tune or a failing O2 sensor heater
  18. Oil Filter Adapter

    You're actually right





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