Garrett GT30R turbochargers feature:

• dual ball bearings – fastest spool up, unmatched strength
• high efficiency turbine & compressor wheels – more airflow and less heat
• center bearing housing ports for coolant – water or oil
  (coolant ports not used on air-cooled 911 engine applications)
• Turbine housing is cast from high-nickel "Ni-Resist" material for extreme applications – ideal for air-cooled applications

These incredibly efficient turbochargers are rated up to 52# airflow and support up to 525hp. 
A good match for 3.0L Turbos seeking better performance than a K27 turbocharger offers.
Suitable for 3.3-3.4L Turbos with original CIS injection seeking an ultra responsive turbocharger and moderate performance, or for cars at high altitude.

Ideal for very high power 3.6L - 3.8L twin turbos with EFI – these will blow away any K16-based or K24-based hybrids!  We have made over 750rwhp

3 compressor housings options:

• Ported Shroud intake – reduces compressor surge, 4.0in inlet / 2.0” outlet
• “B” type housing – easier installation into a 911 Turbo, 3.0in inlet / 2.0” outlet
  
  Polishing and/or flow polishing available for all compressor housings.

Several turbine housing options:

• T3 (K27) inlet flange – direct bolt on to your 911 Turbo exhaust manifold
  with GT31 outlet, 4-bolt 3.0" ID
• T3 (K27) inlet flange – direct bolt on to your 911 Turbo exhaust manifold
  with T31 outlet, 4-bolt 2.5" ID
• T3 (K27) inlet flange – direct bolt on to you 911 Turbo exhaust manifold
  with 3.0" v-band outlet
• Divided T3 (K27) inlet flange – direct bolt on to you 911 Turbo exhaust manifold
  with 3.0" v-band outlet
  
  Ceramic thermal barrier or cosmetic ceramic coating available for all turbine housings.