I just changed the muffler on my ‘69 Charger 12.
There are quite a few Gravely 18543 aftermarket mufflers out there so I decided to purchase 2; 1 from Amazon for $45 and 1 from NAPA (7-03679) for $72. Both are made in Taiwan and while the Amazon muffler actually felt a tad heavier to me, its welded construction was poorer so I decided to use the NAPA muffler.
To complete the installation, I needed a 1.25” x 4” black pipe nipple and a 5/16” x 1-1/4” exhaust clamp (NAPA 733-5323).
In conclusion, it seems to me the sound out of the Gravely style muffler is noticeably quieter than the classic pepper pot. Worth the $80 to me!
Link to my YouTube video:
I have a 522xi and noticed the muffler is glowing red as shown in this video? Should I be concerned and fix it to normal operating temps or is this expected?
Finally got the stack installed, getting that threaded pipe out of the head needed a little persuasion but all went well, and it looks fantastic thanks to Jim Kemp!
I am in the process of restoring a 72 Raider 8 and decided I would beef it up a bit with a custom stack. Currently the motor is out of the tractor and am waiting for a rod, piston, cam shaft and bearing set. Motor was in total self destruct mode when the previous owner didn't check the oil 🙄🤦🏼♂️ So I made this stainless stack out of sch 5, 2 inch pipe and reduced to 1". Decided I didn't like to looks of threaded pipe so I found a couple valve parts to act as the flanges, and am going to weld the other flange to a threaded nipple and screw into the engine block. Let me know what you think! Trying to decide if I should leave it flat, mitre it or weld a turnout on it!
Also, I'm going to hold out for now until I can hear it run straight piped, but considering rolling a stainless screen down to 1" and packing gap between the stack and the screen with muffler packing. Has anyone else ever done this? Looking for ideas and comments are welcome!