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!
By Blackhood Bill
Ok guys seen many pics of both original and some with stacks. My question is Is a stack quiter or is it just for looks. Just wondering.