Subaru Downpipes – Catted & Decat Performance Exhaust Upgrades

Subaru Downpipes – Unlock the True Potential of Your Boxer Engine

Subaru has built a reputation for engineering cars with incredible driving dynamics, turbocharged performance, and all-wheel-drive capability. Models like the WRX, WRX STI, Forester XT, and Legacy GT feature powerful turbocharged boxer engines with huge tuning potential. However, restrictive OEM downpipes limit exhaust flow, reduce turbo efficiency, and muffle sound. Upgrading to a performance Subaru downpipe is one of the most effective modifications to increase horsepower, sharpen throttle response, and achieve an aggressive motorsport-inspired exhaust note.

Why Upgrade to Performance Subaru Downpipes?

The stock Subaru downpipe is designed to meet emissions and noise regulations but compromises performance. A high-flow performance downpipe offers several advantages:

• More horsepower and torque – optimized exhaust flow reduces backpressure, allowing your engine to perform at its best.
• Faster turbo spool – reduced turbo lag results in quicker throttle response and stronger acceleration.
• Sportier exhaust tone – catted downpipes offer a refined sound for street use, while decat downpipes unleash an aggressive, race-inspired roar.
• Lower exhaust gas temperatures – improved thermal efficiency protects your engine during high-performance driving.
• Perfect for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo upgrades.

Types of Subaru Downpipes

Our selection of Subaru performance downpipes suits various driving styles and tuning levels:

Catted Subaru Downpipes

Catted downpipes integrate a high-flow sports catalytic converter, balancing emissions compliance and enhanced performance. Perfect for daily-driven cars in regions with emissions testing.

Decat Subaru Downpipes

Decat downpipes completely remove the catalytic converter, maximizing exhaust flow and raw power. Best suited for track-focused builds or regions without emissions restrictions.

Material Options: Stainless Steel & Titanium

Material choice significantly impacts durability, weight, and heat resistance:

• Stainless steel downpipes – corrosion-resistant, robust, and cost-effective.
• Titanium downpipes – ultra-lightweight, premium thermal properties, and a motorsport-grade finish.

Subaru Model Compatibility

Our Subaru downpipes are designed for a wide range of performance-oriented models:

• Subaru WRX Downpipes – optimized for EJ20, EJ25, and FA20 turbo engines.
• Subaru WRX STI Downpipes – engineered for high-performance 2.5L turbocharged boxer engines.
• Subaru Forester XT Downpipes – perfect for turbocharged 2.0 DIT and 2.5 XT models.
• Subaru Legacy GT Downpipes – designed for 2.0 and 2.5 turbo petrol engines.
• Subaru Levorg Downpipes – tailored for FA20 and FA24 turbocharged setups.
• Subaru BRZ Turbo Builds – compatible with forced-induction kits and custom setups.

Performance Gains with Subaru Downpipes

Replacing your OEM downpipe with a performance Subaru downpipe provides instant power gains and improved drivability:

• +15–35 HP from the downpipe upgrade alone.
• +40–80 HP when combined with Stage 2 ECU tuning.
• Better torque delivery across the mid-range.
• Sharper throttle response and reduced turbo lag.

Choosing the Right Downpipe Diameter

Pipe diameter is critical for achieving optimal performance based on your tuning stage:

• 2.5-inch downpipes – ideal for Stage 1 setups and mild tuning.
• 3-inch downpipes – recommended for Stage 2 builds, hybrid turbos, and high-boost configurations.

All our Subaru downpipes are designed for direct bolt-on installation, ensuring seamless fitment without cutting or welding.

Engineering & Build Quality

Our Subaru performance downpipes are built to the highest standards to withstand extreme conditions:

• Mandrel-bent tubing ensures smooth, unrestricted exhaust flow.
• High-quality stainless steel or lightweight titanium construction.
• Precision TIG welding guarantees durability and leak-free performance.
• OEM-style flanges and fittings for factory-level integration.

Pairing Subaru Downpipes with ECU Tuning

To unlock the full potential of your Subaru downpipe, pair it with ECU remapping:

• Achieve significant horsepower and torque improvements.
• Optimize boost control and fueling strategies.
• Customize exhaust sound profiles based on catted or decat configuration.

Daily Driving vs Track Builds

For street-driven setups, catted Subaru downpipes balance power and emissions compliance. For dedicated track builds, decat Subaru downpipes deliver unrestricted exhaust flow, aggressive tone, and motorsport-level performance.

Conclusion

Upgrading to a performance Subaru downpipe is one of the most effective ways to improve power, turbo response, and exhaust sound. Whether you choose a catted downpipe for street usability or a decat downpipe for ultimate performance, our range of Subaru downpipes guarantees premium quality, seamless fitment, and proven gains. Take your Subaru’s performance to the next level today.