ACR-MSR06 clutch spring 1/8 & 1/10 Nitro is as good as the Mugen MSR Clutch Spring that is one of the most popular spring in Nitro RC racing today. If you race a lot ACORN 10 pk should last you all year. Most Facotorg racers change there clutch spring every 2 hours of racing.
ACORN RACIBG is also making a ACR-SHP07 Clutch Spring that is going to follow the shephard stiff spring, COMING SOON in AUG
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