The GKTECH billet aluminium GTR roll center adjusters are an easy DIY bolt in and provide a notable difference in the handling of your vehicle, particularly for lowered cars. No further modifications are required, simply unbolt the standard ball joint (2 bolts), slip in the adapter (0.78" (20mm), and with/without the extra 0.19" (5mm)) and install the new longer bolts. Vehicle Compatibility: - Nissan R32 GTR - Nissan R33 GTR - Nissan R34 GTR