Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not for 2 1/2 exhaust pipe

If you are trying to fit 2 1/2" exhaust pipe this device will not work even if you ensure it is well lubricated. The standard pipe here is about 2mm thick and I had to go to a muffler shop to get it expanded. What happened was the pipe expanded about 1mm or less then the bolt snapped and the spreader popped out and ended up in the muffler, this took a bit to get out as I was assembling the exhaust and had to remove a section of pipe to get to the muffler in the exhaust tunnel. I would probably recommend getting a grade 8 or higher bolt and see if it works but I think the bolt it comes with is about a grade 3 bolt.