#80253, "RE: Some turbo questions." In response to Reply # 0
The S13 turbo has a standard T25 flange and so does the S14 and S15. Now for the other questions, you should visit a nissan forum. Plus the s13 turbo is not all that , not a big difference for the 2g 4g63 T-25. You should get your hands on a s14 turbo,it is a T-28 Ball Bearing turbo. If you really have money, then go with the S15 turbo. Quick spool!!