


COMP Cams Thumpr 227/241 Hydraulic Roller Cam - Oldsmobile 260-455
Marsoni
M251S
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Friday, May 29
COMP Cams Thumpr 227/241 Hydraulic Roller Cam - Oldsmobile 260-455High performance street, stock converter ok, best with 2000+ converter and gears, choppy thumping idle.
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4.5 ★★★★★
Based on 1802 reviews
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Product Reviews
★★★★★ 5
exactly what i needed
I wanted to add to my original review 6 months ago This little mount has stayed on my Model X for 6 months now and it works GREAT! Very sturdy and the magnet locks on immediately every time I drive. it's handy on the top left of my screen for a WAZE map to be alerted for those issues on the road whenever I'm on a long drive.
I'm really happy with it and I bought another one for my coworker's birthday. Uploading another video. I would highly recommend.
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This mount for my Tesla is exactly what i needed for my road trip. I really don't need it to wireless charge as cable are faster anyway. Pros:
- Very easy to install. doesn't test my IQ with all the unnecessary instructions.
- NO NEED for 3M stickie adhesive on my car. I just simply don't want this in my car! Bad experience in the past and I'll return anything that needs to uses a 3M adhesive.
- Very strong magnet grip. Bought it right before my 10 hour road trip, no issues at all.
- connects to the top 2 angles on my model X, I will likely buy another mount for the passenger seat. It will also work with the bottom angle when I tilt the screen out.
- And it seem to be able to bypass the Tesla cabin camera during AP/FSD.
Down sides:
- it would be great if it can also charge- however i would not want a cable dangling to the 12v port./
- price is a bit on the high side
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2024
★★★★★ 3
Falls regularly
It works for a bit but falls from my screen on a very regular basis no matter how tight I tighten it or what position the phone is in. The magnet it strong, but the mount itself doesn’t hold on to the screen where it’s supposed to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 13, 2026
★★★★★ 5
Great mount
Really like this mount: Very versatile, no glue
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Reviewed in the United States on February 17, 2026
★★★★★ 4
It holds the phone pretty well!
Updated review:
I gave this another try and it worked, the reason was previously I was rotating the nob in the wrong direction... now it fits pretty well and stays in the installed position securely! But I'm still worried about the added pressure on the display, hopefully it works fine. Overall I think it's worth a try if you need a magnetic phone holder!
(ps: I was never contacted by the manufacture, I figured out the correct way to use it so I came here to update my review)
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Original title:
Doesn't fit my Model 3 display too well, and it adds pressure on it. I wouldn't recommend it
Original review:
I don't understand all the positive reviews of this MagSafe holder. It could work, but I find it very unstable on my Model 3 2023's display. After I fit it onto the display and tried adjusting the angles or taking off the phone, the holder tended to fall off. Also it adds pressure to the display which could technically damage it. I wouldn't recommend this.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2024
★★★★★ 5
👍👍👍
🥰🥰🥰
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Reviewed in the United States on December 21, 2025
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