So ive head from a few people that the MST kit its pretty limited to HP because it uses Vband on the Turbine.

What are some options for bigger power without having to replace the kit.

Ive heard about the GTX35 turbo.

Ive heard that the GT37 even loses its steam...

Im looking to go for 650whp now since I have the engine. haltech and fueling mods.

 

Take the Up-pipe to a fab shop and get them to cut the V-band flange off. Then weld a T4 flange in it's place, buy a Precision 6266 or 6766 T4 turbo with the .96 a/r turbine housing ad get 650whp on pump gas....not sure if the 2.25" up-pipe will flow that much though.

Could also benefit from going to a larger FMIC. All these top mount kits suffer because they use small T3 turbine housings that run out ouf flow capacity after 550whp or less, depending on the kit.