Welcome to Bristol Core's website. We are an American manufacturer specializing in muffler packing for motorsport.

What we do...

If you are a rider or builder looking for high quality material to pack a muffler with, you've come to the right place.

Off road riding can be torture on muffler packing. We offer packing kits and materials designed for the heat and revs of two stroke (RaceTEX) and four stroke (Spec 31) motocross, ATV, UTV and adventure bikes.

Riding a big twin and need to repack? Maybe your muffler is getting too loud and what originally sounded great has developed a sharp "crack" sound. Take a look at our new
24" SPEC 31 Kit. You can rely on our high-end SPEC 31 for a packing system that will hold up to many, many miles of riding.

Sportbikes with aftermarket mufflers sound awesome, until the packing blows out and it starts sounding like a big empty tin can. We can help you restore the rip and roar with materials that will last.

If you need some assistance deciding what materials or kit will work best for your application, feel free to either call us at (585)-919-0302 or send an e-mail to info@bristolcore.com. We're available Monday through Friday 8am to 5pm Eastern.

SPEC 31 Muffler Packing 750g HD Steel Wool Sheet 8.5" x 24"
Price: $42.95
Price: $17.95
SPEC 31 Muffler Packing - Our Best Material! Our highest quality steel wool will dramatically help increase the life of any muffler packing.  This 8.5" wide x 24" long sheet will cover cores up to 2.25" in diameter.

New Packing Kits

Spec 31 Universal Pillow Kit - 24" Length
Price: $44.95

We offer flat rate shipping to the lower 48 states!

$1-$10 $7
$11-$20 $8
$21-$50 $9
$51-$100 $10
$100 and over FREE!