i bought a 90dx it had 93 eg seats but both seats had all four bolts. i asked the previous owner what rails did you use he said the stocc rails. i compared 88 89 to 90 91 seats they adjust diffrent. so i took the eg seats out took the rails off and put them on 00ls leathers worked perfect they both bolted down with all for bolts. so is it tru u can use 90 91 rails.