Why not buy Taiho & forget about it? C172L (for 4ZA1/4ZB1/4ZC1 engines - as it is written on the packaging) And one more thing, ARP head studs from S2000 perfectly fits to G_W. 208-4702 overall length 177mm thread length 32mm - M12x1.5mm thread length (nut & washer side) 28mm - M12x1.25mm to...