AMS Subaru STI/WRX Turbo Kit Produces Results

At AMS Performance, there’s no doubt that our regard for producing the highest quality, best performing parts on the market transcends throughout every make and model we work with. We make no exception to this when it comes to manufacturing parts for the Subaru STI.  This was recently proven when AMS Performance New Jersey dealer, Prime Motoring, ran an incredible 9.68@147mph ¼ mile pass in their full weight 2015 Subaru STI using our AMS Subaru Rotated Mount 950 R V-Band Turbo Kit.

AMS Performance Prime Motoring 2015 Subaru STI

Really, there’s no secret to such levels of performance. The key has always been developing parts that provide a vast improvement in efficiency and longevity over the factory OEM parts. An AMS Subaru Turbo Kit will not only perform beyond your expectations, it offers a clean look and is designed to last the lifetime of your STI. When you combine this level of craftsmanship with a quality build performed by a reputable shop like Prime Motoring, the results as shown in the video are nothing short of spectacular!

AMS Subaru STI/WRX Rotated Mount V-Band Turbo Kit

Our AMS Subaru STI/WRX Rotated Mount V-Band Turbo Kits can be purchased with your choice of three different turbochargers. With power output ranging from 350 – 950 horsepower, we have just about every Subaru STI owner covered. It’s an excellent choice because unlike many kits currently on the market that are difficult to install, our kits are intelligently routed, provide perfect fitment and are much simpler to install.

AMS Performance 2008 Subaru STI V-Band Turbo Kit

For their record 9.68 second pass, Prime Motoring opted for the 950R spec turbo along with the 4” Speed Density Intake option. This turbo and intake was chosen because it had the most potential for producing incredible horsepower and torque while retaining excellent spool characteristics – further enhanced by our AMS cast up pipe and stainless steel downpipe. Implementing CAD and casting designs, our Engineers have produced not only an extremely strong and reliable up pipe, but one that is not limited to the restrictions of a hand fabricated piece. Smooth transitions, optimal diameters for both up pipe and downpipe and a solid construction make these exhaust pieces key components to the AMS Subaru Rotated Mount Turbo Kit.

Subaru Up Pipe with 44mm Tial MV-R Wastegate

AMS Subaru STI/WRX Up Pipe with 44mm Tial MV-R Wastegate

AMS Subaru STI/WRX Downpipe

AMS Subaru STI/WRX Downpipe


Optional Subaru Cat Pipe (Straight Pipe is standard)

The AMS Subaru Rotated STI/WRX Rotated Mount Turbo Kit also comes in a 750R version for quick spooling road course response. It is also available in our 900X version for those who do a lot of drag racing but want better low to mid throttle response for the street. These AMS spec turbochargers are supplied by Precision Turbo with ported shroud compressor covers to prevent compressor surge.


750R/900X Turbocharger


950R Turbocharger


Additional Features

  • 2” ID rotated V-band cast stainless steel up-pipe for optimum flow and durability
  • 5/8” thick flange on up-pipe to ensure a proper seal
  • Turbo support bracket maintains turbo kit reliability under any condition
  • 304 stainless steel TIG welded construction
  • Lifetime Limited Warranty on the up-pipe
  • Wastegate feed strategically placed on the Up-pipe for precise boost control
  • 10” stainless steel external wastegate dump tube
  • No gaskets needed for the turbo to up-pipe, up-pipe to wastegate or turbo to downpipe
  • Bolts up to any stock or aftermarket  header that fits the factory up-pipe
  • Downpipe fits AMS & most other aftermarket cat-back exhausts
  • Kit Utilizes 4 ply silicone tested up to 50 psi of boost!
  • New coolant lines for your coolant expansion tank for a clean engine bay
  • DEI heat insulation to protect OEM wiring from excessive heat
  • Kit includes ALL necessary fittings and hardware for installation
  • Class 10.9 fasteners & 4 ply silicone couplers. We use the best hardware and silicone so that it goes together right the first time

Kit includes:

  • Cast stainless steel Up-pipe
  • AMS spec Precision dual ball bearing turbo with ported compressor cover and Precision V-band turbine housing
  • Genuine Tial MV-R 44mm
  • Integrated turbo support bracket
  • AMS high-flow off-road test-pipe (high-flow steel core catalytic converter optional)
  • DEI Heat insulation for your electrical wiring
  • New lines for your coolant expansion tank
  • Stainless steel 3” downpipe with integrated Stainless steel flex section
  • Stainless steel oil feed line (fittings for both WRX and STI included)
  • 4 ply silicone 2.5”” turbo outlet pipe, intercooler and intake couplers
  • Top quality hardware package including nuts, bolts, fittings and clamps
  • Detailed installation guide
  • .63 exhaust housing

As you can see, we take the manufacturing of our parts seriously. We also only choose the very best shops to represent our products.  If you take pride in owning your STI, why compromise on your build? Look no further than AMS Performance and one of our reputable dealers throughout the world. If you live on the East Coast, USA, we certainly recommend Prime Motoring to help you out!


Prime_MotoringPrime Motoring
411 Railroad Ave #1
East Rutherford, NJ 07073
Ph: (201) 935-2910


The goal of AMS is to provide the highest quality, best performing products available.
By utilizing research and development and rigorous testing programs AMS will never compromise the quality or performance of our products.

Check out with afirmFree

On all orders over $199.99 in the lower 48.*Freight items not included*


Learn More

This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.

Some AMS Performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website:

It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.

All performance modifications and installations are at the customer’s own risk. AMS Performance holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.