SKU: GRM.1099.1.SS
GrimmSpeed 2-Bolt Up-Pipe for 2004–2021 Subaru STI EJ25
Improve turbo response and exhaust flow on your 2004–2021 Subaru STI with the GrimmSpeed 2-Bolt Up-Pipe. This high-quality stainless steel up-pipe replaces the restrictive factory unit and is designed to reduce turbo lag while improving overall engine performance.
Built from premium T304 stainless steel with precision welding, it offers excellent durability, corrosion resistance, and a perfect fit. The 2-bolt design ensures a leak-free seal and straightforward installation. Whether you’re building a street car or a track weapon, this up-pipe is a must-have upgrade for any EJ25-powered STI.
Key Features
- Improved Turbo Response – Reduces turbo lag and improves spool-up for better drivability
- Increased Exhaust Flow – Larger diameter and smoother bends improve overall exhaust efficiency
- T304 Stainless Steel Construction – Premium material for excellent strength and corrosion resistance
- 2-Bolt Design – Provides a secure, leak-free connection with easy installation
- Direct Bolt-On Fitment – Precision engineered for 2004–2021 Subaru STI EJ25 engines
- Performance Upgrade – Ideal for both street and track applications
Specifications
| Detail | Value |
|---|---|
| Brand | GrimmSpeed |
| Type | 2-Bolt Up-Pipe |
| Engine | Subaru EJ25 |
| Material | T304 Stainless Steel |
| Design | 2-Bolt Flange |
| Country of Origin | United States |
| Warranty | GrimmSpeed Limited Warranty |
Whats Included
- GrimmSpeed 2-Bolt Up-Pipe
- Gaskets
- Mounting Hardware
- Installation Instructions
Product Notes
- Professional installation recommended
- Best paired with a high-flow downpipe and cat-back exhaust for maximum performance
- Compatible with both stock and aftermarket turbo setups
This Part Fits
| Year Range | Make | Model | Notes |
|---|---|---|---|
| 2004–2021 | Subaru | STI (EJ25 Engine) | Direct fit |
Why Choose GrimmSpeed?
- Industry leader in premium Subaru performance parts since 2006
- Focuses on quality, fitment, and real-world performance gains
- Precision-machined and tested components trusted by Subaru enthusiasts worldwide
- Backed by strong technical support and warranty
Frequently Asked Questions
- Q: Will this up-pipe improve turbo spool?
- A: Yes. The larger diameter and smoother design significantly reduces turbo lag compared to the factory up-pipe.
- Q: Is this a direct bolt-on part?
- A: Yes. It uses the factory 2-bolt flange and includes all necessary gaskets and hardware.
- Q: Do I need a tune after installing this?
- A: No tune is required, but pairing it with a downpipe and proper tuning will yield the best results.
- Q: Will this fit my 2018 Subaru STI?
- A: Yes. This up-pipe fits all 2004–2021 Subaru STI models with the EJ25 engine.
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Secure GrimmSpeed retail packaging
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