This is a super-rare discontinued Kyosho racing kart upgraded muffler for the 1/5 Kyosho Birel R31-SE 31315T1 Readyset nitro racing go kart. This factory upgrade for the Kyosho Birel R31-SE has not been made in years and is nearly impossible to find. This item is in new condition .

I have many other rare Kyosho Birel go kart parts and upgrades for sale. I can combine shipping.