copied from SU website:
CPE Hybrid Hitachi-Warner K04 Turbocharger Upgrade: MAZDASPEED 6, MAZDASPEED 3
Coming Soon!
CPE is currently developing a hybrid turbocharger upgrade for the SPEED6/SPEED3 capable of safely eclipsing the 300whp mark. The stock turbocharger works well in stock trim, but becomes inadequate once power levels being to increase. It simply cannot flow the amount of air required for better than 300hp, and trying to do so will result in a lot of hot air and/or a wrecked turbocharger.
Though the parameters may change as the project progresses, we would like to retain the stock turbine housing and keep changes to the compressor side. This will allow the turbocharger to be used on stock style exhaust flanges, so no specific manifold or downpipe will be required.
So what's up with this effort? Any news?
CPE Hybrid Hitachi-Warner K04 Turbocharger Upgrade: MAZDASPEED 6, MAZDASPEED 3
Coming Soon!

CPE is currently developing a hybrid turbocharger upgrade for the SPEED6/SPEED3 capable of safely eclipsing the 300whp mark. The stock turbocharger works well in stock trim, but becomes inadequate once power levels being to increase. It simply cannot flow the amount of air required for better than 300hp, and trying to do so will result in a lot of hot air and/or a wrecked turbocharger.
Though the parameters may change as the project progresses, we would like to retain the stock turbine housing and keep changes to the compressor side. This will allow the turbocharger to be used on stock style exhaust flanges, so no specific manifold or downpipe will be required.
So what's up with this effort? Any news?