Of course if one has a 49 state without the oxy cat, why not commend the practical joker? Had the BB trick played on me, truly wonderful new power and economy. Could also have replaced the EGR valve, as it was sticking in the open position and dumping unburned fuel back into the intakes on accel, thus confounding the ALDA mixing and throwing gobs of nasty black smoke with no guts. I liked the BB trick. Can you predict any long term problems without an oxy cat in an 85 Turbo CD?