Review on M12 x 1.25 Stainless Steel 316 Slim Round Head Allen Key Slotted Plug with Copper Washer for O2 Oxygen Sensor or Oil Drain: Durable and Reliable Solution by Alex Tellekson
Good fit, good brass washers to tighten
I used these to plug the exhaust ports of a 1985 454 with smoke tubes. They fit perfectly and were able to tighten them without deforming the bushing. They don't taper like a brass stopper. Used 8 of these and didn't switch for the first few heat cycles.
Pros
- Fits me great
Cons
- No instructions
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