the 350z trans won't fit in an IS300... the trans tunnel will need completely cut out and widened - its doable for sure, but you won't find many if any that have done that.... R154 fits no problem, V160 fits no problem, etc...
-cody: maintenance forum moderator
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2001 Lexus IS300 - 500whp/476wtq (Mustang Dyno)PTE 6765/Custom AEM EMS - Auburn Sky Pearl (1 of 1348)
1999 Isuzu VehiCross 285/75-16 Destination MT's - Astral Silver Metallic (1 of 1021)