I think that mazda makes the 4.77's for the Kia's and the 4.10's in the S2000 but what I was wondering if is are the Kia gears are a reliable option. If any of you guys have any info on how reliable the kia 4.77's are it would really be appreciated.

 

There have been so many threads about this over the last month. Please do a search and I'm sure you'll find all the information you could possibly want.

 

Search for "The truth about the Honda S2000 Ring & Pinion"

That thread will answer all your quetions.