FMF Turbinecore 2 Spark Arrestor Silencer - 025181. Overview of FMF Turbinecore 2 Spark Arrestor Silencer - 025181.This top-notch product has well earned its U. The straight through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail proven unrestricted power. The Turbinecore 2 is the #1 spark arrestor in the world. This item fits the following machines.