Spark Arrestor #20 Screen Replacement Montesa 4rt

Spark Arrestor #20 Screen for the newer style (ribbed) 4rt exhaust to change out the #30 Screen

Replacement #20 Screen more open than the #30 Screen

RIBBED is the newer style Montesa 4rt that has the ring on the exhaust tip

Non RIBBED is the older Montesa 4rt that has no ring on the exhaust tip