Category Archives: MHI Turbo

Includes Posts about TDO3, TDO4, TDO5 Evo1-3, Evo4-9 Upgrades and Parts for these turbos.

DSM 14b 16g Turbo Internal Wastegate Actuator

14b 16g Turbo Wastegate ActuatorDSM 14b 16g Turbo Internal Wastegate Actuator 







DSM 14b 16g Turbo Internal Wastegate Actuator


Simple Ways How to Test for a Bad Wastegate Actuator:

  • Stretch the Wastegate Actuator Rod Open with Your Hand, While the Wastegate Actuator is In this Position (Open position) Then Put your thumb Over the Nipple to not Allow air to Leave the Wastegate Actuator. If The Wastegate remains in the Open Position, then that means that the Wastegate Diaphram is Still in Perfect shape. (If the WG is Tightly close but diaphram blown air Past or doesnt hold vacuum, this causes Full Boost Condition.)
  • Check for Binding of the Wastegate Rod when the Wastegate Actuator is Mounted. Often the wastegate actuator diaphram can be Crushed Causing the wastegate rod to get stuck on the wastegate frame. This is more of an alignment issue with the wastegate actuator. (Usually This Condition Causes the Wastegate Door To be In Open Position When the Wastegate is Mounted, Causing Lag and Little or No Boost.)
  • You Should be able to Apply air Hose Pressure to a Wastegate Actuator to have the Wastegate Open and Remain Open Without Leaking air our of the Diaphram.(If Doesnt Open Full Boost Condition can be the Result)
  • Broken or leaking Wastegate Nipple (Causes full Boost Condition Because the Boost Pressure is not able to open the Wastegate Relief Valve)

NOTE: Usually a Bad Wastegate Actuator Means Little or No Boost or Full Boost Conditions. 

NOTE: If You see Boost Spike Above Target Boost, The Way to fix this is to use a Boost Source as Close to the TurboCharger as Possible, With as Short of a Vacuum Line as Possible, The Spike is simply Cause By a Delay in getting the pressure of the Turbo to the Wastegate Actuator. This is not a sign of a Bad Wastegate Actuator.  

NOTE: If You see the You Reach Your Target Boost, Then See that your Boost Creeps from Your Target Boost Level When the Engine is Turning Higher RPM 4500 or Above, this is not a sign of a Bad Wastegate Actuator. The Reason This is Happening, is because the Wastegate Flapper hole and or passage after WG Hole will not Flow Well Enough To Control The Boost Level, This Can Be Fix By Porting.

But if too Much Porting is Applied, Then You Could have an issue with not being able to run high boost, Because The Exhaust Pressure Gains so Much Ground On the WG flapper, that The Exhaust Pressure will force open the WG Spring Before the Pressure To the WG Nipple is Applied. At This Point you need a Wastegate with a Higher PSI Spring Pressure. Choose the Base Pressure of the Spring by taking your Target boost and Divide it by 2. If you want to run 30psi, you should use a 15 psi WG with a boost Controller. Or you Could use a 30 psi wg without a boost controller.

NOTE: Wastegate Adjustment Should Not be Treated like a Boost Controller, Excess tension will Cause the Turbine Housing To Crack Sooner.

MHI 20g Compressor Housing and Compressor Wheel

20g Compressor housing and wheel 2We Offer New MHI 20g Compressor Housing and 20g Compressor Wheel

  • 52.6mm x 68mm Compressor Wheel
  • Balanced and Ready to Install
  • Fit TDO5, TDO6 Turbos
  • Upgrade for 14b, 12a, s16g, b16g, Hahn Racecraft turbos, Fp Turbos, 68hta, Evo X,
  • 3″ Inlet Compressor Housing 2.25″ Outlet

MHI 20g Compressor Housing

MHI 20g TDO6 Turbine Wheel

TDO6 turbine WheelWe Have MHI 20g TDO6 Turbine Wheel Available for Purchase.

TDO6 Turbine Wheel Specs:

  • 55mm x 65mm
  • 12 Blade
  • 55 lb/min Capable
  • 713 Inconel
  • Left Hand Thread

This Turbine Shaft Is Found on Factory Typhon 17C turbochargers.

This Turbine is Rated at 450 Hp. You can Purchase the TDO6 Turbine Wheel Here:

20g TDO6 Turbine Wheel

9 Blade TDO6H Turbine Wheel Upgrade

tdo6h turbine wheel 2We Offer TDO6H 9 Blade and 11 Blade Turbine Shafts for Evo 1-3, Evo X, and DSM. 

TDO6H Turbine Specs:

  • 58.8mm x 67.2mm
  • 11 Blade Or 9 Blade
  • Balanced and Ready to Install
  • 10mm Nut – Allows for More Airflow
  • 713 Inconel
  • 9 Blade is 180 Grams (lighter than Factory TDO5H turbine!(194 Grams)

This Turbine is a Direct Upgrade for Evo X and DSM Turbo Upgrades with the tdo6h Turbine Wheel, Such as FP Red, FP Black, and Older FP Green (Measure your Shaft).

We Sell the 9 Blade TDO6H Turbine Wheel Here:

TDO6H 9 Blade Turbine Wheel


We Sell the 11 Blade TDO6H Turbine Wheel Here:

TDO6H 11 Blade Turbine Wheel

14b, 20g, Big 16g TDO5H Turbine Wheel

TDO5H turbine WheelWe Offer OEM 12 Blade and 9 Blade TDO5H Turbine Shafts. 

The Advantage of the 9 Blade Turbine is that It is ~37 Grams Lighter and It Will Outflow the 12 Blade.


Big 16g TDO5H Turbine Wheel Specs:

  • 49mm x 55.6mm
  • 12 Blade OEM (194 grams)
  • 9 Blade (157 grams)
  • 713 Inconel

Direct Fit For:

  • 14b 16g 18g 20g
  • Older FP 68hta and 71HTA
  • Subaru 16g
  • Evo X
  • Not for Evo 4 – 9
  • Not Direct fit for TDO5 Starion (47mm x 55mm)

Buy OEM 12 Blade TDO5H Turbine Wheel Here:

tdo5h turbine wheel


Buy OEM 9 Blade TDO5H Turbine Wheel Here:

16g turbine wheel

Forced Performance FP Red Turbo Rebuild Kit

FP Red Turbo Rebuild KitWe Offer Turbo Rebuild Kits for FP Red, Green, Black, 73 HTA, 71 HTA, 68 HTA Turbochargers. 

We Offer 2 Separate Rebuild Kits.

  • Evo 1-3 and Evo X
  • Evo 4-9



If You Need to Purchase a Turbo Rebuild Kit for an FP Turbo for a DSM, Evo 1-3 or Evo X. You Can Purchase Here:

FP Red turbo rebuild kit


If You Need to Purchase a Turbo Rebuild Kit for an FP Turbo for Evo 4 – 9. You Can Purchase Here:

Forced Performance Red turbo rebuild kit


Why Use Our Rebuild Kits?

Have You Noticed In and Out Shaft Play with Your FP and MAP Turbochargers?  I Have Seen Steel Thrust Bearings in these Turbos In the Past. Steel is not a Good Bearing Material, and the Steel Bearing Requires Zinc Rich Oil. But Even if You Use the Special Oil, You can Still Have Failures. The Steel on Steel Contact Builds Up Excessive Heat in the Cartridge, Causing the Oil to Dry Up, Which Causes the Thrust Bearing to Fail.

FP Says On their Website, that the Warranty is Void if you Push Their FP Black Over 28 PSI. With Our 100% Copper Bar Thrust Bearings, We Have People Pushing 34 PSI Daily Driven with a Turbo Lab 60mm Evo 9 Turbo, Making over 600 HP, Without Problems.  Copper Bar Dissipates Heat and is Standard Material In OEM Turbochargers.


EVO 9 FP Red Black TDO6H Reverse Turbine Wheel

FP Red tdo6h turbine wheel 2We Sell Replacement Turbine Shafts for the Evo 9 FP Red and Black TDO6H Reverse Turbine Wheel. Take Note that This Turbine Shaft is Reverse Rotation for Evo4-9 Only. Also This Turbine Does Not Fit the FP Green Turbine Housing, Without Machining.





If You Would Like To Buy This Turbine Shaft, You can Purchase it Through Our Ebay Store Here:

FP tdo6h turbine wheel



  • 58.8mm x 67.2mm
  • Balanced (you should Rebalance if you are using your Original Compressor wheel)
  • 713 Inconel
  • Replaces MAP EF4 Turbine, FP Red and FP Black Turbine Wheel Shaft
  • Made In the USA

We Also Sell Upgraded Rebuild Kits for the EVO 9 FP Green, Red, Black, and MAP Turbochargers Here: 

Subaru 20g Turbo For Sale

subaru 20g Turbo for saleSubaru 20g Turbo for Sale.

Price: $650 Brand New

We Have MHI Subaru 20g Turbocharger For Sale, Ready to Order:

Compressor Wheel Options:

  • Billet 6 Blade, 7 Blade, 11 Blade
  • Cast 20g
  • 52.6mm x 68mm x 71mm

Turbine Wheel Options

  • TDO5H 12 Blade and 9 Blade 49mm x 55.6mm
  • TDO6SL2 11 Blade 54mm x 61mm
  • TDO6 12 Blade 55mm x 65mm
  • TDO6H 11 Blade 58.8mm x 67.2mm

subaru 16g turbo

If You have a 2.0 Liter WRX and You are Looking to Make 360 to 400 HP but not lose Spool time. Then a 16g or TDO5H 20g Is a Good Choice.

If You have a 2.5 Subaru STI Engine, Then a Good Choice is to go With a TDO6 or TDO6SL2 20g, with a 7 Blade Billet Wheel, Which Is Good for 425 Hp. (The Shops I build turbos for Told me this is the Best STI turbo Upgrade.)


The Reason Why is Because If the Engine is Larger, the Turbo Needs to Be Larger Or the Engine Will Outflow the Turbo At Higher RPM Causing Loss of Power at Higher RPM.

We Can Build These TurboChargers with a 60mm x 82mm Billet wheel and 58.8mm x 67.2mm Turbine Shaft Also.  However The Purpose of This Post is to Share with You an Excellent Street Turbo.

If you are Interested in Purchasing One of These Turbos, then Contact Us Here.

FP MAP EVO 10 EVO X Turbo Rebuild Kit

evo X Turbo rebuild kitBuy EVO X Turbo Rebuild Kit for Factory EVO X and Upgraded Turbochargers!


  • EVO X MAP Upgraded Turbo
  • EVO X FP Turbo
  • Other EVO X 16g Upgraded Turbochargers




This kit includes:

  • 1 upgraded Machined From Copper Bar Dual Oil Port Thrust Bearing
  • 1 18mm thrust collar
  • 1 18mm thrust spacer (factory is 14mm)
  • 2 journal bearings
  • 1 front seal
  • 1 rear seal
  • oring for compressor housing
  • oring for inside the turbo
  • 2 bearing retaining clips
  • 1 stainless steel rear heat shield
  • 1 c-clip to hold in the front plate.
  • 1 oil return gasket
  • 1 Compressor Nut
  • 1 Oil Deflector
  • Free Shipping in the United States
  • watch our video on rebuilding the turbo. It contains important information for the thrust collar modification



EVO 10 EVO X Turbo Rebuild Kit

TDO4 Turbine Upgrade – TDO4HL 9 Blade

TDO4 Turbine Upgrade

TDO4HL 9 Blade VS 12 Blade

The MHI TDO4 Turbos Are One of the Smallest Turbos to Upgrade. Luckily, there is an TDO4 Turbine Upgrade!




Here are the specs of the TDO4 Series Turbos:
TD04 = 40.0mm exducer, 47.0mm inducer
TD04L = 41.3mm exducer, 47.0mm inducer
TD04H = 44.2mm exducer, 52.0mm inducer
TD04HL = 45.6mm exducer, 52.0mm inducer

Normally all the MHI Shafts are 12 Blade, But We were Fortunate Enough To Get Our Hands on TDO4HL 9 Blade Turbine Shafts! We use these for Service and also Sell them!

The TDO4HL 19T Turbos are capable of 325hp and 400+ FT/LB torque with the Factory TDO4HL Turbine. Now You Have the Ability to Get Back More Horsepower at Higher RPM Which is When the Engine Starts to Outflow What the Turbo is Capable of with the 12 Blade Turbine.

This is an Excellent Upgrade for:

  • Volvo TDO4HL Turbo Upgrade (Direct Fit)
  • Subaru 13T TDO4L Turbo Upgrade (Machining Required)
  • Hyundai Genesis TDO4L 13T Turbo Upgrade (Machining Required)
  • Hyundai Genesis TDO4HL 19T Turbo Upgrade (Direct Fit)
  • 3000GT TDO4 Turbo Upgrade (Machining Required)
  • Dodge Stealth TDO4 Turbo Upgrade (Machining Required)
  • Saab TDO4 Turbo Upgrade (Machining Required)
  • Acura RDX (May Require Machining)

Details About 9 Blade TDO4HL Turbine:

  • 45mm x 52mm
  • 9 Blade Outflows and Outspools 12 Blade
  • Lighter Weight as Show Below Comparing 9 Blade and 11 Blade
  • Balanced and Ready To Install
  • Excellent Upgrade for 19T (46.7mm), 20T (47mm), or 50 x 62 x 65mm Billet Wheel
  • We also sell TDO4 Upgraded Rebuild Kit Here

tdo4HL 9 blade Tdo4hl 11 bl weight








 Visit Link Below To Purchase:


TDO4 Turbine Upgrade