Briggs & Stratton Raptor Flathead .015" Oversize Top Ring - 555504 - Racing Engines track organization By eliminating lateral flex and

By eliminating lateral flex and distributing clamping force evenly across the shaft

Pushing your racing go kart engine to the absolute limit requires internal components that refuse to yield under extreme cylinder pressures

It prevents catastrophic engine failure caused by valve float or piston-to-valve contact during missed shifts or over-revving

and compressed air to clear the jet passages

015" oversize component

Briggs & Stratton Raptor Flathead .015" Oversize Top Ring - 555504 - Racing Engines track organization By eliminating lateral flex andSealing combustion pressure is the absolute foundation of building a competitive racing go kart, and the Briggs & Stratton . 015" Oversize Top Ring (MPN: 555504) is engineered specifically to restore peak cylinder compression in worn Raptor flathead blocks. When your cylinder bore shows the inevitable signs of seasons spent at maximum RPM, dropping in a standard ring allows blow by, instantly killing your torque off the apex. By utilizing this