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Muffler bolt sizes?

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Old 03-06-2024, 02:58 PM
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Default Muffler bolt sizes?

2017 fkhxs, Are the muffler clamp bolts 15mm?
Are the heat shield bolts 8mm? Thanks
 
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Old 03-06-2024, 07:40 PM
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Clamps on the left muffler and crossover are 9/16", on the right muffler is 15mm. Shield worm clamps are 5/16".
 

Last edited by Ya Tigor; 03-06-2024 at 07:42 PM.
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Old 03-06-2024, 08:14 PM
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Originally Posted by Ya Tigor
Clamps on the left muffler and crossover are 9/16", on the right muffler is 15mm. Shield worm clamps are 5/16".
Thank you, I have heard, after digging, that left side was smaller but not in my case, 9/16 to small 5/8 to big, it took me awhile to figure they must be metric. Maybe dealer used different clamp/bolt. I was stumped, never dealt with metric on exhaust that I remember and nothing in SM about sizes and of course I don't have any metric deep sockets. I finagled metric wrenches in there to try and size it, finally come to a conclusion it was metric. I hadn't checked right side yet, I expect it's 15mm too.
 
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