stiperformanceparts.com is an independent retailer of aftermarket performance parts and is not a subaru authorized or approved sti parts dealer or repair facility.
Aftermarket Performance Parts for the Sti
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Agency Power Racing Downpipe - Subaru STI 08+
The downpipe is full stainless steel with a bell mouth upper section. The .4" thick flanges ensure a tight and strong seal. The downpipe deletes both your catalytic converters and bolts to all factory style turbos.
Our Price: $300.00
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AQ Motorsports 04+ STi EWG Uppipe (44mm)
The AQ Motorsports External Wastegate Uppipe (EWG) uses a Tial 44mm wastegate to control boost on even the most stuborn turbos. Using an EWG eliminates issues with boost creep and can even make more power than a traditional internally gated turbo.
Features:
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Our Price: $229.95
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AQ Motorsports 08+ STi Catback Exhaust
The AQ Motorsports 2008 STi catback exhaust features full 3-inch mandrel bent 304 stainless steel piping throughout for optimal flow and longevity. The muffler, flanges and custom dual wall polished stainless tips are fully TIG welded for an excellent finish.
This system is the per...
Our Price: $999.95
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AQ Motorsports 08+ STi Turboback Exhaust
Our top quality turboback exhaust has been proven to make an extra 10 peak horsepower and torque at wheels with no tuning. When pro-tuned to Stage 2 using the COBB AccessPORT, gains of 35 horsepower and 62lb/ft of torque were seen.
AQ Motorsports Downpipe Features:
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Our Price: $1474.95
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AQ Motorsports 08+ WRX/STi and 05+ LGT 5MT Downpipe w/ HiFlow Cat
The AQ Motorsports downpipe with hi-flow cat substantially improves performance and responsiveness by replacing the 2 restrictive factory cats with 1 high flow unit. The cast bellmouth design greatly reduces restriction at the turbo outlet and flows into 3" mandrel bent piping. An O2 bung is incl...
Our Price: $498.95
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AQ Motorsports 08+ WRX/STi Downpipe Uncatted
AQ Motorsports introduces our un-catted downpipes for the 08+ Subaru WRX/STI. The same quality and performance delivered in our catted downpipes is now being offered in uncatted. The cast bellmouth design greatly reduces restriction at the turbo outlet and flows into 3" mandrel bent piping. An O2...
Our Price: $398.95
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AQ Motorsports Up Pipe - 04+ STi
If your Subaru came from the factory with a catted up-pipe, we highly recommend replacing it to avoid the possibility of turbo damage. Our up-pipe is made with quality materials and will improve exhaust flow, providing quicker spool and more power.
Features:
-100% TIG Welded...
Our Price: $128.95
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Cobb 3" Downpipe: Subaru Impreza STi 2008-2011
The COBB Tuning turbo downpipe is one of the premier modifications most owners look to upgrade on their vehicle. By opening the diameter of exhaust flow coming out of the turbo, the COBB downpipe unleashes more power potential over the stock restrictive unit.
Fits: Subaru STi 2...
Our Price: $595.00
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Cobb Tuning 3" SS Cat-back Exhaust: Subaru STI 2008-2010
Introducing the COBB 3" Stainless Steel Cat-back Exhaust for the 2008 and newer Subaru STI. This much anticipated exhaust uses a unique straight-through muffler section rather than common chambered designs, which minimizes tubing bends, reduces back-pressure and keeps sound output below SAE stand...
Our Price: $1195.00
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FIC 650cc High Z Fuel Injectors - STi 04+
Subaru WRX Injector Set *(Fits STi with fuel rail conversion)
4x650cc Super FAST Lightweight EV14 Custom Modified Saturated/High Impedance Ball & Seat Injectors. Includes pigtails PGT USC4 or add P&Play adapters PADPUtoD4.
Our Price: $329.00
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Full-Race 1.5 Scroll Up-Pipe/Lower Manifold - Subaru Sti 04-05
Back by popular demand - Full-Race is proud to offer their STI/WRX 1.5 scroll header/up pipe for Stage2 Subarus - the earliest spooling, fastest response and most hp/tq of any stock location header. The 1.5scroll system consists of their twinscroll lower manifold (the same one used on their legen...
Our Price: $2174.00
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Greddy RACING TI-C '08+ SUBARU STI
GReddy Racing Ti-C Cat-back Exhausts combine the design, looks and flow
of our Full Racing Titanium systems with the durability, deep sound,
value and large application list of our other Stainless Steel street
systems. This fusion of aggressive styling and practical construction,
makes this t...
Our Price: $774.25
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GReddy SP Elite Exhaust - 08-11 Subaru STi Hatchback
The SP line of GReddy Exhaust systems has set the benchmark for bolt-on,
Street Performance: with style, sound, fitment, power and quality since
1994. The SP Elite, is GReddy's latest version of this full
stainless-steel legacy. Similar in style to the Spectrum Elite line, th...
Our Price: $1235.00
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HKS Downpipe: SUBARU Impreza WRX STi 2008
For maximum exhaust flow and quicker turbo spool up, HKS offers
downpipes for racing use. Each mandrel bent down pipe is a bolt-on
application that will mount to the stock turbo and/or to a HKS turbo
upgrade kit. Certain HKS Downpipe applications are made from coated
stainless steel or polish...
Our Price: $469.95
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Injen Catless Downpipe - Subaru STi 08-10
Let your 08-10 STI breathe better with a performance downpipe from Injen Technology. Mandrel bent from full three-inch stainless steel, these quality Injen downpipes feature thick flanges and a cast divided-wastegate (aka divorced style) mouth at the turbo connection.
Our Price: $397.80
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Injen Downpipe w/Cat - Subaru STi 08-10
Let your 08-10 STI breathe better with a performance downpipe from Injen Technology. Mandrel bent from full three-inch stainless steel, these quality Injen downpipes feature thick flanges and a cast divided-wastegate (aka divorced style) mouth at the turbo connection.
Our Price: $533.80
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Kartboy 12MM Black Exhaust Hanger - STi 2008-2011
The Kartboy Polyurethane Exhaust Hangers are a direct replacement for the stock soft rubber exhaust hangers on all Subaru vehicles built in the recent past. The benefit of this modification is reduced swaying of the exhaust systems, stopping the exhaust from bumping into the car. The polyurethane...
Our Price: $8.00
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M7 T-Titan Catback Exhaust - Subaru STi 08+
Introducing the latest design from M7 Japan, the M7 catback exhaust
system is a high performance exhaust system with styling to match. The
exhaust is constructed of high grade Japanese stainless steel with
ported flanges to increase the exhaust flow for your turbo vehicle. Each
exhau...
Our Price: $950.00
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Magnaflow Catback Exhaust System: WRX STi 08-09
Improve horsepower and increase throttle response instantly!
TECH TIP: Direct bolt on - includes gaskets, bolts, and everything else for an easy installation.
Fits: Subaru WRX STi 2008-20...
Our Price: $654.53
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MagnaFlow Direct Fit OBDII Catalytic Converter; OEM Grade - STi 08-09
MagnaFlow Direct-Fit Catalytic Converters by Car Sound are designed for
easy bolt-on installation for the Professional Installer. Welding,
cutting and tube bending equipment is not required. Each is designed to
exact original equipment specifications. The Direct-Fits are avai...
Our Price: $513.77
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Megan Racing Cat-Back Systems - OE-RS - Subaru STI 08-10
Megan Racing OE-RS series cat backs are based on factory style, with bigger piping, OEM style polished mufflers and quiet sound. The cat back system is made stainless steel. All piping are mandrel bent with a high polished finish. Exhaust system comes with all the necessary hardware needed for a ...
Our Price: $569.95
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Perrin Catback Exhaust Quad Tip: STi 08+
Finally released after a long time of R&D! The results were WELL
worth it! More than 15 WHP gain! Looks to kill and performance galore.
The sound is amazing! (Sound clip to be posted ASAP!)
3" Plumbing to maximize performance
3.5" quad tips
Our Price: $1043.99
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Perrin Down Pipe Rear Section: STi 2008
If your factory catalysts are tired, broken or missing PERRIN™ now offers a replacement catalytic converter that is approved for all states that do not require CARB approval.
Utilizing 3” 304 stainless steel, polished to a mirror finish, these are an excellent alternative to the in...
Our Price: $350.99
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Perrin Down Pipe Single Piece: Subaru STi 08+
3" Stainless Downpipe with a Highflow Cat
We brought back an old classic! Back by popular demand is the PERRIN Single piece 3" downpipe with single high flow cat!!
Crafted from 3” 304 Stainless Steel, mandrel bent and TIG welded, this
product insures smooth exh...
Our Price: $521.99
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Perrin Downpipe Front Section: STi 08+
More power and performance!
If your factory catalysts are tired, broken or missing PERRIN™ now offers a replacement catalytic converter that is approved for all states that do not require CARB approval....
Our Price: $350.99
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Perrin Quad Tip Cat-Back Exhaust - STi Sedan 2011
PERRIN Performance mufflers have a true 2.5" internal diameter for uninterrupted exhaust flow . PERRIN mufflers and flange connections are equal throughout the entire length, not necked down, for ultra smooth transitions throughout the system.
Oversized 3.5" slash cut exhaust tips ...
Our Price: $1169.99
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Perrin Up-pipe: Subaru STI
Made from 321 stainless steel and 1/2” flanges this is guaranteed not to
warp, leak or fail. Power increases are consistent and strong. The up-pipe is
still one of the best and first ways to increase the power and throttle response
on your Subaru.
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Our Price: $206.99
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Synergy Turbo EJ25 Exhaust Manifold - STI/WRX
Our Synergy Turbo Manifold was designed for the WRX/STI to provide increased exhaust flow efficiency. Our 4-2-1 equal length manifold is constructed out of SUS304 stainless steel. The main pipe inner/outer diameter is 1.7 inches; collector inner/outer pipes are 1.8 inches. Our up pipe inner/outer...
Our Price: $650.00
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stiperformanceparts.com is not a subaru authorized sti parts dealer or repair facility. stiperformanceparts.com is not affiliated, related to, or endorsed by Subaru of America or Fuji Heavy Industries LTD in any way. stiperformanceparts.com is an independent retailer of performance parts and accessories that is not affiliated with Subaru of America (Fuji Heavy Industries LTD). Use of trademarks is done on a fair use basis and without intent to compete with, or take advantage of Subaru or its trademarks. For more information on Subaru please visit http://www.subaru.com
