FANTASY FLASH SALE

Save $30 on Losi NASCAR Fantasy vehicles!

SHIFT INTO OVERDRIVE

Full Throttle Rewards | VIP perks, exclusive deals & more

NEW & IN STOCK

Available now and ready to ship

FANTASY FLASH SALE

Save $30 on Losi NASCAR Fantasy vehicles!

SHIFT INTO OVERDRIVE

Full Throttle Rewards | VIP perks, exclusive deals & more

NEW & IN STOCK

Available now and ready to ship

Next Shipment August 2026

OS Engines Piston Ring: GF40

OS Engines - OSMG7839

$27.99

Earn Full Throttle Rewards With Every Purchase. Learn More.

OS Engines Piston Ring: GF40 Product Specs

Manufacturer #49403400