Many Subaru owners want their turbo cars to spool up quicker and still deliver great horsepower and torque gains.

This downpipe fits all Subaru WRX or STI cars from 2002 to 2007. The downpipe is full stainless steel with a cast bell mouth upper section.

The all new Agency Power stainless steel header kit is now available for your Subaru STI 04-07

This uppipe is made from 321 high grade stainless steel. Completely polished, the uppipe uses 1/2 inch thick flanges for maximum strength connecting to your factory or Agency Power aftermarket header.

This new stainless steel exhaust system features a brilliant titantium muffler with a titanium 4.5 inch tip etched with the Agency Power logo.

The AMS Subaru Impreza WRX/STI Stainless Steel Cat-Back Exhaust uses only the finest components and provides the best fit and finish in the industry. Our exhaust features only mandrel bent piping for the best exhaust flow and does not have any restrictions like other popular exhaust systems that ...

The GT Spec Muffler is the ultimate in high power exhaust systems. Previously available only for select GT class vehicles, we are now proud to offer the GT Muffler for a wide variety of popular vehicles. The GT System is a FULLY polished stainless steel exhaust uti...

Apexi exhaust N-1 features the angled muffler, Apexi exhaust was the first to produce this type of muffler style on a manufacturing basis in Japan.

Apexi N-1 exhaust pipes aim for the straightest possible line with the least number of pipe bends. This allows exhaust gases to pass ...

The WS Exhaust series is the A'PEX answer to the ultimate street muffler system with all around performance. The canister is made of the highest grade polished SUS304 stainless steel while the mandrel bent piping consists of high temperature, titanium particle coat...

Increased exhaust velocity adds power, driving excitement, fuel economy and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere.

Best of all, BORLA stands behind every system with a Million-Mile Warranty.

Increased exhaust velocity adds power, driving excitement, fuel economy and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere.

Each system is built from premium austenitic stainless steel, superior to T-400 series knockoffs, to give you the absolute...

CNT Version 2 Subaru 02-07 WRX 04-07 STI Flame Series Catback Exhaust.

Cobb's new system is constructed entirely of high-quality T304 Stainless Steel, from the hangers to the flanges. The COBB WRX Cat Back Exhaust system replaces everything after the stock catalytic converter with smooth, 3" mandrel bent piping. The system is tastefully finished out ...

Significantly reduce turbo lag with Cobb's truly engineered downpipe. Designed for optimal performance and durability, the downpipe features full 304 Stainless Steel construction. Starting from the turbo, exhaust gasses enter the cast stainless steel bellmouth housing that utilizes int...

The Cobb turboback was designed to be everything your were looking for in an exhaust system -- a complete, truly engineered system, the least amount of turbo lag, optimal performance, tasteful looks, and unparalleled durability without a loud and obnoxious exhaust note. The end resul...

Over a year of testing and development, Crawford Performance is now ready to release the Crawford Performance Signature Series Exhaust.

ERZ & CNT performance 02-07 Catted Subaru WRX and STI Down-pipe.

Today’s sophisticated tuners want it all, and GReddy’s SE exhaust systems deliver the full spectrum of features desired in a street performance system. SE exhausts increase flow via tuned piping and larger, free-flowing mufflers for improved power, but provide discreet sound levels that won’t...

A full External Wastegate (EWG) set-up consists of a EWG up-pipe and a wastegate.

An External Wastegate (EWG) allows exhaust gases to be diverted prior to entering the turbo; creating quicker turbo spool.

An External Wastegate (EWG) allows exhaust gases to be diverted prior to entering the turbo; creating quicker turbo spool.

1/2"+ Thick Flanges, 14 Gauge Tubing, TRIPLE Layer Flex Joint. We are DURABILITY.

1/2"+ Thick Flanges, 14 GaugeTubing, TRIPLE Layer Flex Joint. We are DURABILITY.

GTSPEC GEN II exhaust manifold is the revision of the orginal. The revolutionary velocity chamber design and the high quality finish are unchanged on the new generation as we strive to bring the best value to our customers.

In our endless pursuit of perfection, we are happy to introduce to you our NEW equal length exhaust manifold for the Subaru WRX/STI. Crafted from 14 GaugeSUS-304 Stainless Steel, GTSPEC’s headers are tigwelded inside and out to ensure a perfect flow and perfect fit.

GTSPEC Twin Spool Exhaust Manifold With Uppipe. Make to fit JDM STI (VF36, VF37, PE1825 turbos). Equal length design.

Come with velocity chamber to minimize turbulance inside the pipe.

HKS has incorporated this new race inspired offset muffler and piping design, which offers a greater flow and higher-RPM power gains due to the less restrictive design. 

This is achieved by eliminating unnecessary bends for the straightest exhaust path, the large an...

The addition of a downpipe yields significant horsepower gains.

The piping is 2.75" Stainless Steel, and includes gaskets & bolts.

Fits: Subaru WRX STi 2002-2007

HKS cat-back exhaust system is developed to improve your torque and horsepower.

Full 3 inch cat-back with a great deep throaty sound.

Adds HP and increased throttle response.

Sound: Low deep growling sound. Pro...

Designed for improved exhaust flow. Instantly increase exhaust flow for a big stock location turbo.

TECH TIP: This 1-piece header includes the uppipe

Subaru WRX/STI 02-UP Cat-back

Item number: HS02SW1GTP

Invidia Subaru Impreza 02-UP WRX Up-Pipe

Part# HS02SW1UPP

Invidia Subaru Impreza 02-UP WRX W/Cat Down-pipe

Part# HS05SW1DPC

Subaru WRX/STI 02-UP Down Pipe(Divorced Waste Gate)

Item Number:HS05SW1DPN

Subaru WRX/STI 02-UP Down-Pipe(no-polished)

Iten Number: HS02SW1DPN

Improve horse power and performance with its straight-through design.

All Turbo Types have a 3" inlet and a tip that is specially designed to reach the maximum performance, and have a perfect match on body styling.

As a direct bolt on, each Cat-Back comes with 12 m...

The missing component between any Header/Manifold and your Cat-Back system, these Downpipes will give you the high-flow exhaust system that you desire.

With a noticeable power gain and polished finish, these are a perfect touch for any performance vehicle. (Note: For off-road use ...

With law enforcment becoming ever more strict with modifying your vehicle with performance parts, the need for more discreet performance parts have increased to keep a low profile.

Megan Racing has developed a line of Cat-Back exhausts systems to meet the needs of todays Low-Profil...

This manifold is made by 100% stainless steel. Just like other Megan Racing stainless steel products, this manifold is built with the best welding technology, CNC machine for smoother air flow.

- Special design, ONE pipe manifold in...

Subaru has always been unique with their powerplant layout; their opposed 4-Cylinder engines lay flat and have a complex exhaust system. This was ideal for performance and space savings and made an amazing sound.

However, emissions came in and Subaru placed a very restrictive Cata...

Maximum exhaust flow, increased horsepower and a smooth tone. All mate perfectly with factory hangers, undercarriage and bumper. Each features 3” stainless steel plumbing and fully flanged joints to ease installation.

STi owners a sp...

If your factory catalysts are tired, broken or missing PERRIN™ now offers 49-state approved catalyst replacements.

Utilizing 3” 304 stainless steel, polished to a mirror finish, these are an excellent alternative to the inefficient factory replacements.

Using...

If your factory catalysts are tired, broken or missing PERRIN™ now offers 49-state approved catalyst replacements.

Utilizing 3” 304 stainless steel, polished to a mirror finish, these are an excellent alternative to the inefficient factory replacements.

Using...

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, thisproduct insures smooth exhaust flow...

Reaching back to lessons learned by tuners in our past, PERRIN™ has grabbed a dramatic power increase that was previously bottled up by the factory manifolds.

The turbocharger relies on energy from the exhaust flow to rotate its blades. By pulling additional energy that was otherwise...

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. ...

Harder rubber compound helps reduce movement of exhaust system during demanding driving conditions.

This complete system includes a full SUS304 stainless downpipe and cat delete pipe that have thicker construction to withstand the heat of extreme exhaust gas temperatures.

The catback portion of this system features lightweight SUS304 piping with a specialized full Inconel tip. <...

Improve HP and throttle response in your STi instantly!

CONCEPT G acheives extremely high levels of exhaust system efficiency, while maintaining a street driveable, extremely clean sound output that is under 93db.

This system requires no removeable silencer for under...

Titek's Downpipe offers mandrel bend piping, made of polished SUS304 stainless steel. 

With a full 3” piping, quicker turbo spool and maximum exhausts flow and guaranteed horsepower gain. 

MADE FOR OFF ROAD USE ONLY this will bolt-on to stock a...

Titek's Downpipe offers mandrel bend piping, made of polished SUS304 stainless steel. 

With a full 3” piping, quicker turbo spool and maximum exhausts flow and guaranteed horsepower gain. 

MADE FOR OFF ROAD USE ONLY this will bolt-on to stock and ...

TIT-SUB-20003

TiTek Cat-Back Titanium Exhaust System: 02-07 WRX/

STi

4-1 Design for Response!
 
Provides An All New Boxer Sound.

Full SUS304 Stainless steel design.

TECH TIP: Direct bolt on! I...

4-2-1 Isometric Design for Optimum results at High End RPM!

All round perfect performance balance to maximize the EJ25 turbine potential.

- Perfect Pipe Size, All Equal Length
- ...