Spark Arrestor #30 Screen Aluminum Montesa 4rt (Non Ribbed Exhaust)Machined Aluminum spark Arrestor with stainless set screws with a very compact design. Has screen size #30 (legal screen) Fits Montesa 4rt WITHOUT the rib on the exhaust tip Has Internal diameter of 28. 85mm That would need to fit over the end of the exhaust Slips over the silencer and tightened with 3 stainless set screws. Easy to clean just take off spray with brake cleaner or use solvent. When attaching to the bike be sure to tighten the 3 set
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