Sillygit

I have noticed that just about every Altezza that has had its filter uprated has been uprated to HKS units. Is there anything wrong with Apexi, TOMS, or Blitz etc.. units or is it because the HKS powerflow induction kit has been found to be the best. Also has anybody installed an Ecotec CB26-P ( http://www.ecotekforum.com) ? I am considering this as it is supposed to improve low rev torque.

Have you corrected the problem yet? If not this may help. It seems like I problem I had and it turned out to be the clutch - apparently this is a common fault with manual Altezzas. To check, change up a gear, say 3rd to 4th at around 4500 rpm, but engage the clutch very slowly and softly and keeping you foot off the accelerator. The revs will drop to 3000 rpm and you may find that the rumbling noise does NOT appear. Then press down on the accelerator alittle to raise the revs and now you should hear the rumbling. If this is the case I think you can be quite sure it is the clutch.