Hi mate, yes you can't go wrong mate with the Superior gear. I have a full setup of Superior gear under both my GQ and my GUIV and drive with confidence.
For your interest I have just swapped my front diff on the GQ for a GU front diff and I have a 4140 superior Tie Rod that I am looking to sell as it is not suitable for a GU diff and need to buy a GU one.
See this link
http://www.superiorengineering.com.a...roducts_id=867
Superior now do a 4340 instead of a 4140 but both use a female tie rod end instead of a male tie rod end which is Much Stronger too.
If your interested in upgrading and still saving a little cash then this one is for sale. It will cost me $395 to replace it for the GU front end and hoping to get $275 for this one.
Cheers Darren