XForce 1.75″ TRI-Y Header & Up-Pipe Subaru Impreza WRX STI / Forester – TH-EJ20-TY
Upgrade your turbocharged Subaru with the **XForce TH-EJ20-TY 1.75″ TRI-Y Header & Up-Pipe**, manufactured from high-quality **304 stainless steel** for improved exhaust flow, durability and performance.
Designed around a tuned-length **4-2-1 TRI-Y configuration**, the system helps reduce exhaust back-pressure while improving flow towards the turbocharger.
Key Features:
- 1.75″ XForce stainless steel header
- Tuned-length 4-2-1 TRI-Y design
- High-flow stainless steel up-pipe
- 2.25″ pipework after the collector flange
- Stainless steel flex bellow
- Brushed 304 stainless steel construction
- TIG-welded construction
- Designed to connect to the factory turbocharger
- Suitable for selected Subaru Impreza WRX/STI and Forester turbo applications
- XForce part number: TH-EJ20-TY
Only 1 left in stock
Delivery & Return
We aim to dispatch orders as quickly as possible using reliable UK courier services. Delivery times can vary depending on stock availability, supplier location and the type of product ordered.
Estimated delivery times are shown where available, but these should be treated as a guide rather than a guaranteed delivery date.
Some specialist, made-to-order, imported or supplier-direct performance parts may take longer to arrive. If you need a part by a specific date, we recommend checking availability before ordering.
Once your order has been dispatched, tracking information will be provided where available.
UK Delivery
We deliver throughout the United Kingdom.
Shipping charges are calculated at checkout based on the size, weight and destination of your order. Larger or heavier items may have an additional delivery charge.
Deliveries to the Scottish Highlands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other remote locations may take longer or incur additional charges.
International Delivery
International shipping may be available for selected products and destinations.
Import duties, taxes, customs charges and local handling fees are the responsibility of the customer unless stated otherwise. These charges are not included in the product price or standard shipping cost.
Please check your local import requirements before placing an international order.
Incorrect, Damaged or Faulty Items
Please inspect your order as soon as it arrives.
If your item is damaged in transit, faulty or different from what you ordered, contact us as soon as possible with your order number and clear photographs where relevant.
We will review the issue and advise you of the appropriate next steps.
Vehicle Fitment & Compatibility
It is the customer’s responsibility to check that a product is suitable for their vehicle before installation.
Please verify the vehicle model, year, engine, chassis code, part number and any relevant brake, suspension or drivetrain specification before ordering.
If you are unsure about compatibility, contact us before purchase with your vehicle registration or VIN and the product SKU where possible.
We cannot accept responsibility for incorrect fitment caused by inaccurate vehicle information, non-standard modifications or aftermarket conversions that were not disclosed before purchase.
Special Order & Made-to-Order Products
Some performance parts are specially ordered, imported, customised or manufactured specifically for a customer.
These products may be subject to different cancellation and return conditions. Where applicable, this will be confirmed before the order is processed.
Refunds
Approved refunds are normally issued back to the original payment method after the returned item has been received and inspected.
Original delivery charges and return postage may not be refundable unless the item is faulty, damaged or supplied incorrectly.
Please allow time for your bank or payment provider to process the refund after it has been issued.
Need Help?
If you have any questions about delivery, returns or product compatibility, please contact Performance Car Parts UK before ordering. We will be happy to help you check product details and fitment information.
XForce Subaru WRX STI TRI-Y Header & Up-Pipe – TH-EJ20-TY
Improve exhaust flow from your turbocharged Subaru boxer engine with the XForce TH-EJ20-TY 1.75″ TRI-Y Header and Up-Pipe. Designed for selected Subaru Impreza WRX, WRX STI and Forester turbo models, this performance exhaust manifold package replaces the restrictive factory header arrangement with a high-flow stainless steel system engineered to improve exhaust gas flow towards the turbocharger.
Manufactured from 304-grade stainless steel and TIG welded throughout, the TH-EJ20-TY combines performance-focused construction with the durability required for a high-temperature turbocharged exhaust system.
Tuned-Length 4-2-1 TRI-Y Design
At the centre of the XForce TH-EJ20-TY is its tuned-length 4-2-1 TRI-Y header configuration.
The 1.75-inch primary pipe design brings the four exhaust ports progressively together through the TRI-Y arrangement before directing exhaust gases towards the turbocharger. This configuration is designed to improve exhaust scavenging and reduce unnecessary back-pressure compared with a restrictive standard manifold.
For modified Subaru WRX and STI models, improving exhaust flow before the turbo can form an important part of a complete performance exhaust and engine tuning package.
High-Flow Stainless Steel Up-Pipe Included
The package includes a matching high-flow stainless steel up-pipe, meaning the upgrade is not limited to the header itself.
The up-pipe incorporates a quality stainless steel flex bellow. This flexible section helps accommodate engine movement and thermal expansion within the exhaust system while maintaining a strong connection between the header assembly and turbocharger.
The system is designed to connect to the factory-position turbocharger, making it particularly attractive for road and performance Subaru builds retaining the original turbo location.
304 Stainless Steel Construction
XForce manufactures the TH-EJ20-TY from brushed 304 stainless steel. The manifold is TIG welded throughout to provide strong, clean joints capable of dealing with the demanding temperatures generated by a turbocharged Subaru engine.
Key construction details include:
- 1.75″ header primary design
- Tuned-length 4-2-1 configuration
- TRI-Y manifold layout
- 2.25″ pipework after the collector flange
- High-flow stainless steel up-pipe
- Stainless steel flex bellow
- Brushed 304 stainless steel
- TIG-welded construction
- Factory-position turbo connection
Designed for Turbocharged Subaru Performance
The TH-EJ20-TY is designed for selected turbocharged Subaru applications including versions of the Subaru Impreza WRX, Impreza WRX STI and Forester Turbo.
It is particularly relevant to the popular Subaru performance generations using EJ-series turbocharged engines, including GC/GF, GD/GG and selected Forester applications.
Because Subaru used several EJ20 and EJ25 engine variants, turbo configurations and chassis revisions across different markets, we strongly recommend confirming the vehicle’s year, chassis code, engine and turbo configuration before ordering.
Why Upgrade Your Subaru Exhaust Header?
The factory exhaust manifold has to satisfy mass-production requirements involving emissions, noise, manufacturing cost and packaging. A performance header is instead designed with exhaust gas flow as a major priority.
The XForce TRI-Y system can therefore be used as part of a performance package aimed at:
- Improving exhaust gas flow
- Reducing exhaust restriction before the turbocharger
- Supporting improved turbo response
- Complementing upgraded downpipes and cat-back exhaust systems
- Supporting tuned EJ20 and EJ25 performance builds
- Providing durable stainless steel construction
Actual performance gains will depend on the vehicle specification, turbocharger, exhaust system, ECU calibration and other modifications.
Professional Installation & ECU Calibration
Professional installation is recommended.
Whenever major exhaust components are changed on a turbocharged Subaru, the vehicle’s ECU calibration, fuelling, boost control and supporting modifications should also be considered. Depending on the vehicle and existing setup, ECU calibration may be advisable to obtain the best results safely.
Always confirm compatibility before installation, particularly on imported Japanese-market vehicles or vehicles with aftermarket turbochargers.
Buy XForce TH-EJ20-TY in the UK
Order the XForce TH-EJ20-TY Subaru TRI-Y Header & Up-Pipe from Performance Car Parts UK for your Subaru WRX, STI or compatible Forester turbo performance project.
SKU: TH-EJ20-TY
Brand: XForce
Product Type: Exhaust Header / Manifold & Up-Pipe
Material: 304 Stainless Steel
Header Size: 1.75″
Configuration: Tuned-Length 4-2-1 TRI-Y
Technical Specification
Subaru specifications vary by year, chassis code, engine, turbocharger and market.
Please confirm compatibility before ordering, particularly for imported or modified vehicles.
Vehicle Fitment
| Year | Make | Model | Chassis / Variant | Engine |
|---|---|---|---|---|
| 1994–2000 | Subaru | Impreza WRX / STI | GC8 / GF8 | 2.0L Turbo EJ20 Series |
| 2000–2007 | Subaru | Impreza WRX / STI | GD / GG | 2.0L Turbo EJ205 / EJ207 |
| 1997–2002 | Subaru | Forester Turbo | SF / SF5 | 2.0L Turbo EJ205 |
| 2002–2008 | Subaru | Forester Turbo / XT | SG / SG5 / SG9 | 2.0L EJ205 / 2.5L EJ255 Turbo |
| 2007–2011 | Subaru | Impreza WRX | G3 Hatch / Sedan | Selected EJ Turbo Applications |
| 2008–2014 | Subaru | Impreza WRX STI | G3 Hatch | Selected EJ25 Turbo Applications |
| 2011–2014 | Subaru | WRX | G3 Hatch / Sedan | Selected EJ Turbo Applications |
| 2011–2020 | Subaru | WRX STI | G3 / VA Sedan | Selected EJ25 Turbo Applications |
| Weight | 9.25 lbs |
|---|---|
| Dimensions | 71 × 20 × 41 in |
Delivery & Returns
UK Delivery
We deliver throughout the United Kingdom using reliable courier services. Delivery times vary depending on stock availability, supplier location, product size and destination.
Shipping charges are calculated at checkout where applicable. Larger, heavier, specialist or supplier-direct items may incur additional delivery charges.
Dispatch Times
We aim to dispatch in-stock products as quickly as possible. Some specialist, imported, made-to-order or supplier-direct performance parts may require additional processing time.
If you require a product by a specific date, please contact us before ordering so availability can be checked.
Tracking
Tracking information will be provided where available once your order has been dispatched.
International Delivery
International shipping may be available for selected products and destinations. Import duties, taxes, customs charges and local handling fees are normally the responsibility of the customer unless otherwise stated.
Returns
Please contact us before returning an item. Products should be returned in accordance with our returns policy and in suitable condition where applicable.
Special-order, made-to-order, customised or imported products may be subject to different cancellation and return conditions.
Damaged, Faulty or Incorrect Items
Please inspect your order as soon as it arrives. If an item is damaged, faulty or different from what you ordered, contact us promptly with your order number and clear photographs where relevant.
Vehicle Fitment
It is the customer’s responsibility to confirm product compatibility before installation. If you are unsure, contact us with your vehicle registration or VIN and the product SKU before ordering.
