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Welcome.

Welcome to Bristol Core. We are an American manufacturer specializing in muffler packing for motorsports. We offer muffler packing solutions for motocross bikes, ATVs, UTVs, sport bikes, big twins, snowmobiles and automotive performance systems.


Visit our new website at WWW.BCIRACETEX.COM

"It's just muffler packing, right?"

Often overlooked and misunderstood, a muffler's packing material plays a crucial role in more than just the engine's sound level and sound quality. Packing is a really important component of the entire intake > engine > exhaust system that is designed to work together. It affects how exhaust gas flows through the muffler, impacting the performance of the exhaust system and engine as a whole. Pack a muffler correctly with the right material and the system performs the way it was designed to. A neglected or improperly packed muffler produces higher sound levels, less power, poor throttle response and reduces fuel efficiency.

Are you are a rider, driver or fabricator looking for high quality materials to rebuild or design a muffler with? Whether you are working on a weekend show car or a factory level racing system, we produce materials and solutions designed for maximum durability, sound management and ease of installation.

If you need some assistance deciding what materials 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.

New For 2024! - TecMat Packing Kits are available for newer OEM KTM two stroke and FMF 2.1 series silencers.










Spec 19 19" Four Stroke Universal Kit RTX TecMat E-Glass 18"x 20" Sheet
Price: $34.95
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Price: $19.95
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Spec 19 19" Four Stroke Universal Kit RTX TecMat E-Glass 18"x 20" Sheet
FITMENT - This pillow will fill a four stroke muffler with a shell up to 4.25" in diameter (13.3" in circumference) and up to 19" in length including the end-caps if they are packable.

Cut to length pillow design utilizing our newest high temperature packing material for up to 1500F continuous duty.
Designed for extreme duty four stroke temperatures.
Compressed pillow with a self-adhesive flap designed for easy installation.
Contains 725 grams of Spec 19 packing material
RTX TecMat represents the next generation of glass fiber mat. Compared to traditional fiberglass mats which are made out of chopped fibers, TecMat is constructed with highly texturized, continuous filaments to ensure maximum mechanical durability.

4.5oz/sf 0.5" Thick (1420gsm 12mm thick)

Made In The USA
Spec 19 15" Four Stroke Universal Kit
Price: $31.95
Sale Price: $26.95
You save $5.00!
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Spec 19 15" Four Stroke Universal Kit
FITMENT - This pillow will fill a four stroke muffler with a shell up to 4.25" in diameter (13.3" in circumference) and up to 15" in length including the end-caps if they are packable.

Cut to length pillow design utilizing our newest high temperature packing material for up to 1500F continuous duty.
Designed for extreme duty four stroke temperatures.
Compressed pillow with a self-adhesive flap designed for easy installation.
Contains 575 grams of Spec 19 packing material