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  1. Too good of a deal - something fishy???

    I'm a happy owner of a Mach 1. When I get bored (the weather sux right now) I search the internet for good deals on Mustangs thinking that one day I will find one that will tempt me to trade in my M1 (it's actually how I found my M1). It would have to be like the perfect GT350.... So far, I...
  2. Mach1 owners with the Tremec: when do you shift to 6th gear....

    So I've got the M1 with the Tremec. I've noticed that if I shift into 6th gear under 2k RPM (or under 60 MPH), the engine seems to bog down a bit. Or I guess it "lugs" a bit. So often times I will find myself in the slow lane of the freeway in 5th gear with the RPMs around 2600, which seems like...
  3. People's reaction to seeing a '21-'23 Mach 1 similar to seeing a GT350?

    With the GT350 being discontinued in 2020, and the Mach1 being discontinued after 2023, do you think that folks look (or will look back over time) at the Mach1 in similar "awe" as they do the 350? Meaning, the 350's are relatively rare, unique, have a history dating back to the 60's, and seem to...
  4. Poll: Where do you get your oil changed?

    Having experienced and heard of bad oil change experiences at car dealerships, I'm curious where you all go to have your oil changed...
  5. Lifespan of a 5.0

    I'm driving a '21 M1 with 20,000 miles on it. 3/36,000 warranty will expire next year. Regularly serviced, never abused, and wondering what a reasonable expected lifespan will be for it. What's driving my inquiry is I'd like to keep it for many years and wonder when I can expect to see it start...
  6. Red line in 3rd gear in the Mach 1

    So l'm sitting here trying to beat the heat watching YouTube videos of the Mach 1 and I am seeing these car reviewers consistently holding 3rd gear in a manual transmission high in the RPMs up to red line. For example, a long sweeping curve. Now, full disclosure: I am an older Mach 1 owner and...
  7. Rotten egg smell WOT

    I have a 21 Mach 1 with 12,000 miles on it. Only mod is a resonator delete and add x-pipe. I run Chevron 91. Recently I've noticed a rotten egg type smell after WOT or driving in second gear at around 2300 RPMs (like rolling thru traffic jam or parking lot). Check engine light has not come on. I...
  8. Explosive loud backfire on Mach 1

    I have a 21 Mach 1. 12k miles. Resonator delete and X-pipe. No other mods. 6 speed manual tranny. Run Chevron 91 octane. Today I did an aggressive pull for about 150 yards then backed off and took an off ramp. Heard a very loud backfire from the front end of the car. I thought that I blew a...
  9. X Pipe install and engine temp

    Greetings, folks... I searched the forum first and didn't see anything that directly pertained to my question... I'd appreciate any input.. So, I decided to do a resonator delete and X-pipe install on my active exhaust equipped '21 Mach 1. No other mods. End result is wicked awesome. But, I...


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