Category Archives: New Products

Introducing the Steam STX 67 Plus for Subaru WRX/STI

We would like to introduce you to our newest turbo to our lineup, the Steam STX 67 Plus Turbocharger aka STX 67+.

Best on our gas bench testing of our Steam STX 71 compressor wheel, we were able to estimate that our STX 67+ compressor wheel will flow 0.38 Kg/s or over 51 lbs/min.  That is a huge increase power producing flow vs stock, while still maintaining the quick response of a stock turbo.STX 67 (estimated) vs GTX2067R Compressor Map

STX 67 (estimated) vs GTX2067R Compressor Map

Our gas bench testing on the turbine section illustrates how our turbos are able to both spool quickly, and flow very well even at high RPMs.  This is how we are able to achieve both a quick response and keep building power up top.  This was measured with the STX 67+’s turbine and our 8cm^2 single scroll WRX/STI turbine housing.

STX 71 vs GTX30 turbine map
STX 67+ vs GTX30 turbine map


Do you have a JDM STI style twin scroll turbo setup and exhaust?  We have you covered with our STX STX 67+ Twinscroll.  Still with our up 400 WHP STX 67 compressor wheel, but now with our larger high flowing low-inertia 9-blade turbine.


Production Steam STX 67+ Turbos Are In

Great news, our production Steam STX 67+ turbos for Subaru WRX STI are in stock! The preorders have already started shipping, so you should see your turbos soon.

In case you were wondering, they are similar to our standard Steam STX 67 turbos, except the plus model has the next larger turbine. The should both be 350-400 whp turbos. The plus model might be a better fit for your car than the standard 67 if your car is more built, has a 2.5l motor, or otherwise is higher flowing.

You can read more about them here:
Steam STX 67+ Single Scroll for WRX STI
Steam STX 67+ Twin Scroll for WRX STI
Steam STX 67 Single Scroll for WRX STI
Steam STX 67 Twin Scroll for WRX STI

New Steam STX Turbo Stock
New Steam STX Turbo Stock

Here are some more detailed pictures.

Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger

The port job on these turbos look great. 🙂

Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger
Steam STX 67+ Turbocharger

Introducing the SteamSpeed 3-Port BCS

Tuners strongly recommend them; we recommend them.  Now we make them:  Introducing the SteamSpeed BCS (boost control solenoid aka EBCS) plug and play for all turbocharged Subaru models.

SteamSpeed EBCS for Subaru
SteamSpeed BCS PnP for All Turbocharged Subaru models

Our 3-port boost control solenoid provides super high resolution boost control to dial in much more accurate tunes vs. the old OEM 2-port solenoid.  Our BCS provides your tuner the tool need to safely dial in the correct boost levels, and achieve the best results possible.   At the heart of our BCS is a super reliable industrial valve that is more responsive, higher flowing, more durable than stock.  With our high performance BCS valve,  your turbo will spool quicker, and maintain the tightest possible boost curve.

We include everything you need in the box for plug and play install.  It mounts right to the stock location without modification with our custom made brackets, and clips right into the wiring harness.  We even include new silicon vacuum lines and bolts so no extra trips to the parts store is needed.

SteamSpeed BCS PnP mounting bracket

Installation is a snap.  Our BCS can be installed in 15 min with basic tools by most everyone.

SteamSpeed EBCS
SteamSpeed BCS

We have used the GrimmSpeed BCS on our cars in the past, and they have worked great.  Tuners we have worked with in the past recommend them, so we used their product as a measuring stick.

GrimmSpeed EBCS
GrimmSpeed BCS

For our test, we simply swapped out the GrimmSpeed BCS and hooked in the vacuum lines in the exact same ports and swapped their connector for ours into the wiring harness.

How did it work out?  Not surprisingly, they worked basically the same since they both are based off of nearly identical MAC industrial valves.  In our testing, our higher flow barb option did out flow the GrimmSpeed BCS by about 20%.  Our standard barb option flowed exactly the same.  In fact, in our testing, the boost curves were identical with both BCS.

Swapping the GrimmSpeed EBCS for the SteamSpeed EBCS
Swapping the GrimmSpeed BCS for the SteamSpeed BCS

This is how our EBCS was hooked up to the waste gate.

Waste Gate Hookup
Waste Gate Hookup

Production Steam STX 71 LGT Turbos Are In!

We have a production batch of STX 71 turbochargers for LGT fitment.

It is stock location fitment for:

Legacy GT 05-09
WRX 08-14

People call it LGT fitment because the 05 Legacy GT was the first to have that style of compressor housing.


This baby can easily make 400 whp on cars with the required supporting mods.  Check out the graph of the STX vs a stock VF39.

Check their own product page.

WRX 08-14 and Legacy GT Owners, The Wait Is Over

Introducing the Steam STX 71 with stock Lecgacy GT and WRX 08-14.  There aren’t as many options out there for the LGT guys, and none come to mind that make make STX 71 power.  Our customers have been asking us for a while, when will you make a STX 71 for in stock LGT fitment?

Well, here it is!

Steam STX 71 LGT

This turbo has the same 11-blade GTX3071R spec billet compressor wheel and TD06SL2 9-blade turbine as our STI model, but now with housings and lines for stock LGT fitment.

We are looking forward to the first LGT or WRX 08-14 guys to make 400-450 whp with a stock style turbo.