Quick, high angle steering. Snappy, high impact transitions. Dramatically improved handling. This is our famous Forged Super Angle Knuckle with roll center correction. ~ Forged steel with CNC finished mounting surfaces for strength and symmetry. ~ Gold Zinc Plated ~ 45mm roll center and bump steer correction ~ quick steering ratio ~ up to 70 degrees of angle when equipped with our full front end set of supporting parts ~ Approx 4 to 8.5 degrees ackerman at high angle depending on rack location or use of offset rack spacers. Offers a natural driving feel ~ This is a brand new part ready to bolt on with no core charge, no modification to your OEM knuckle, no two way shipping fees, no down time ~ S13 and S14 versions available differ in the FLCA taper, hub compatibility, and coilover hardware size