*Newest version 3 NOW AVAILABLE and shown in pictures. The V3 now comes with the machined compressor wheel with better aerodynamics. BNR Supercars has several bolt on turbo upgrade options for the Mazdaspeed 3, Mazdaspeed 6, and the Mazda CX7.  These turbo upgrades are designed to be a bolt on replacement for the K04 factory turbocharger. The stock K04 is a throw away unit that shouldn't be rebuilt. The weak points of the K04 is the long shaft length, small shaft width, and thrust bearing design. BNR's newly designed replacement/upgrade far overshadows the K04 turbocharger that comes equipped on the Mazdaspeeds. The benefit of the BNR turbo upgrade for the Mazdaspeed 3, Mazdaspeed 6, and Mazda CX7 is the increased shaft size, shorter shaft length, bigger bearings, better thrust bearing assembly, better turbine wheel, more efficient compressor wheel, and last but not least, more reliability.  No question this turbo upgrade is far more superior to the original equipment turbocharger on the Mazdaspeed MZR DISI. Bolt on! You read that right, it says bolt on. The BNR is a bigger that stock turbo though it still fits within the factory K04 frame and is therefore one of the easiest turbo upgrades to install. This Mazdaspeed turbo upgrade is for the customer wanting to reach the limitations of the stock engine without killing turbo response!  The BNR S3 Turbo upgrade for the Mazdaspeed 3, Mazdaspeed 6, and Mazda CX7 includes the following: BNR GT28 non ball bearing CHRA 360 degree thrust assembly Upgraded wastegate actuator assembly set at 14 psi Balanced to or under .5 gram/in2 Upgraded BNR compressor housing with custom outlet for direct fitment BNR's new turbine housing with improved wastegate port and valve assembly(also made thicker to help prevent cracking) Blue printed in house 1 year warranty!