well guys i got it done. little while ago i feted a kit on a xjs suplied by AJ enginering for a friend i allso droped 4.0 in it as it was 3.6 the air flow meter was biger in internal diametre on the one that aj suplied so my machinist copid it what i got is a bit wierd high acseleration but no much torque on this xjs i feted a aj enginering full exhaust,air filter inlet manifold and uprated fuell presure regulator and it sounds and goes fantastic even that my mate scott spend over 40k in total on his xjs my xjr is not as fast as his xjs the aj guy told me when i spoke with him that i got problem with inlet manifold on mine is to short coud this be true?