I have a T3/T4 T04E. Is there any common impeller wheel replacement that is commonly done i know T3/T4 is the hybrid but mine is a 57 trim and AR 50 and 63 on exhaust side. Wondering if theres an impeller i can change out that would cause have less lag or just more overall flow period.
For reference mine is a Garrett knock off but i have rebuilt and replaced all seals on it before with Garrett parts if that helps.

 

That turbo is 30 years old. I could be wrong, but I doubt anybody makes much for it anymore. I'd personally replace it with something more modern, Garrett gtx/g-series/Borg Warner EFR/s200sx would be a huge step forward.

 

Mmmaybe https://www.ktsturbobilletx.com/