Does that straight-through muffler have a harsher tone and louder note since when you first bought it? Chances are that it just needs to be repacked with fresh fiberglass.
Don’t worry, you don’t need to contact a specialty shop: We covered how to repack a muffler at home–even if it’s a sealed-for-life unit–back in the November 2014 issue of Grassroots Motorsports, which you can read now by subscribing to GRM+ today.
Besides having unlimited access to past and present digital editions of the magazine, GRM+ members also get exclusive deals, a highlighted avatar with "GRM+ Member" added to their forum posts, exclusive access to online articles, and fewer advertisements.
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