It’s official, we now recommend using the ETS STI turbo kit over the Full Race turbo kit. After years of running both kits on our shop builds with great success ETS has edged ahead and is now making more power throughout the RPM range when compared to the Full Race kit.
The Full-Race engineers have out done them selves with the Gen2 EJ25/EJ20 Twin Scroll turbo kit. The new design provides more air flow, less weight, fits multiple generation Subaru chassis and most importantly – generates a nice wide torque friendly power band with huge area under the curve. The T4 twin scroll turbo kit consists of all the necessary turbocharger hot side upgrade components, and utilizing ideal cylinder pairing and the proper implementation of twin scroll technology.
Full-Race engineered these kits to offer optimal performance with instant throttle response, early spool and huge top-end power – while being flexible enough to grow with your future needs and changes in driving style. Full-Race recommends using T4 frame turbochargers such as BorgWarner EFR, Airwerks, or Garrett, PTE or FP, etc. The EFR series turbos have proven to be an outstanding match on the EJ25 engine with tons of size options to choose from and a friendly price point. Whether you are road racing, drag racing or building a “street weapon” daily driver, the Full-Race Twin Scroll Turbo Kit is adaptable to suit any chassis and application, now including the popular 08+ STI and 05+ Legacy GT and 11+ STI.
Included parts
- – Full-Race Subaru WRX/STI Lower Manifold
- – Full-Race Subaru WRX/STI T4 Twin Scroll Up-Pipe
- – Full-Race Subaru WRX/STI T4 Twin Scroll Downpipe
- – Full-Race Subaru WRX/STI T4 Twin Scroll Kit Box (fittings, lines, hardware, etc.)
- – Optional Tial Wastegate and BOV
- – Choice of Turbo (Garrett, Borg Warner, Precision)
- – Replaces factory manifold, u-pipe and down pipe
- – Full Stainless steel runner construction
- – TIG welded using the latest techniques and technology
- – Unmatched Brewed Motorsports customer support from people who have actually used this exact turbo kit!

Finding the right turbo kit is not an easy task, there are hundreds of options that all play a huge roll in how the complete kit performs. Here at Brewed Motorsports we are happy to discuss the finer details of each individual build to ensure a perfectly matched turbo kit. If you need more than just a turbo kit we also offer package deals on intercoolers, Injectors and any other engine part you may need. Not only can we supply you with all the parts you need to reach your goals we can provide custom base maps and complete Etunes for all WRX and STI Full-Race turbo kit customers.
Javier –
After months of trying decide on a turbo kit i finally gave Brewed Motors a call, they walked me through everything to ensure I got exactly what i was looking for out of my subi. Ended up with a Full Race Twin scroll T4 GTX3076R that give huge mid range and over 500 whp on E85.
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Question
alec –
i know this kit is a twin scroll, but is it a ball bearing turbo as well?
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Eric_Brewed –
all EFR turbos are ball bearing 😉
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Heath –
Hi, does it fit a RCM dry sump at all?, RHD aussie car, already have twin 40mm EWG’s and a EFR8474, just chasing a manifold and uppipe etc thanks Heath
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Eric_Brewed –
Yes the FR twin scroll it can be used on RHD cars. You can also use the 40mm vband turbo smart gates no problem.
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Zac –
Does this header and exhaust allow space for the killer b oil pan. Or the aig big oil pan.
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Eric_Brewed –
We do have header options and turbo kit to work with those larger capacity oil pans, please shoot us an email with the exact pan/chassis you are working with and we are happy to get you setup with the correct header/turbo kit configuration.
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Eric_Brewed –
We have a few options that fit the killerB and AIG oil pan please feel free to give us a call or email if you are still looking for something.
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Cody Jerger –
Will this exhaust manifold clear an RCM dry sump system on a usdm 04 sti ej257?
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Eric_Brewed –
The Full Race manifold is actually discontinued BUT we have a few other great options that will fit your drysump system and support whatever turbo/power levels you would like. Please shoot us an email and we can get you all sorted out.
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Question
rudy –
is there a provision for a wideband afr gauge?
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Eric_Brewed –
Yes and i our ETS turbo kit offers both post and pre turbo o2 bungs for wideband o2 sensors.
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