From Exotek Racing:
2 color anodized heavy duty machined 7075 alloy steering rack for the RB, ST and SC series. Designed for use with included 3X6MM ball bearings and crush sleeves for the smoothest and most precise operation. Includes 4 ball bearings, 2 crush sleeves and 2 shims. Polished and anodized in black.
Matches the stock geometry and is compatible with the RB7, RB6, SC6, ST6,etc.