2004R Billet Overdrive Ring Gear
The EA™ ring gear uses E4340 plate attached to the back of the stock OD ring gear.
The spline area on the stock ring gear is prone to cracking and breakage in Hi HP applications.
The spline is EDM cut for perfect spline alignment with the forward drum.
OD ring gear is checked to have less than .0005 run out. Thats the tighest spec in the industry.
If our ring gear does not fit our billet forward drum right the first time its Free.