s 480

The s480 typically has the larger turbine wheel(96x88) there is only one factory housing for that turbo. 1.32 a/r.
 
If you have an S400 with the 96/88 turbine you cant just change the wheel and housing on that turbo. It uses specific center section that has a larger shoulder diameter where the exhaust housing fits on. Or at least that's my understanding of it.
 
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