PFF57-503 is non-adjustable, whereas PFF57-801 allows on-car camber adjustment.
PFR57-531 fits all 3.6 & 3.8 Tiptronic models, Turbo models Manual & Tiptronic, GT2 & GT3 with the twin gearbox mounting bracket at the end of the gearbox.
PFR57-530 fits all 3.4 models, 3.6 & 3.8 Manual models except for Turbo GT2 & GT3 models with a single gearbox bush in the end casing.
PFF57-501-27 fits GT2 & GT3 models.
PFR57-508 fits 22mm width arms, for 19.5mm width arms please use PFR57-1508.
PFR57-510-22 fits upgraded H&R sway bars.
PFR57-511 and PFR57-512 will not fit GT2 and GT3 models.