Bull-X 3″ downpipe for Subaru WRX STI 2.5 300 PS

The 3″ / 76 mm downpipe for the Subaru WRX STI from HG Motorsport can be fitted as a direct replacement for the standard part. Precise fitment and high-quality materials make this a high-quality product. The flange at the turbocharger outlet has been designed without a step at the transition. Optimising the diameter, pipe routing and catalytic converter, where selected, significantly reduces the load on the turbocharger. Lower exhaust back pressure and reduced thermal stress provide a noticeable increase in torque and power, together with earlier turbocharger response. At the same time, service life is extended.

When combined with an EGO-X exhaust system, the downpipe can be made without a flange with reducer if required. A 20 cm long 3-inch sleeve is supplied, allowing a continuous 76 mm diameter.

Technical details

• Plug’n’Play solution – perfect fitment and simple replacement of the original part
• 76 mm / 3″ diameter
• Selectable catalytic converter options: 100-cell, 200-cell, 200-cell Bull-X EOBD and 200-cell HJS (without ECE approval)
• High-quality materials
• TIG-welded stainless steel construction
• Made in Germany
• Flow-optimised design for increased performance
• Improved response and enhanced turbocharger service life
• Efficient evacuation of exhaust gases
• No obstructive edges at the transitions
• Designed and developed using flow simulation, then tested on a test bench
• No more heat build-up at the turbocharger, reducing thermal stress on the turbo
• Improved turbocharger response and increased performance
• Richer exhaust note, particularly when combined with a sports exhaust system

Road use: This product is intended for motorsport use only. Catalytic converters or decat pipes without EG approval are not permitted for use on public roads. The 200-cell HJS sports catalytic converter also only carries a test mark without vehicle application for the Subaru WRX STI, so it does not have road approval for this vehicle.

Suitable for: Subaru Wrx I (STI/VAB/VAF/VAG).

Manufacturer’s vehicle data

• Bull-X Downpipe 3″ Subaru WRX STI 2.5 300PS

Original product name by HG Motorsport (»z.B.« = e.g.). Please check model, year and engine of your vehicle before ordering; if in doubt, contact us and we will check for you.

Approval

Only the version marked “road legal” has a European ECE / EC approval (Bull-X Tronic controller with ECE or the HJS EC catalytic converter). Versions marked “no ECE, track use only” have no approval and are not permitted for road use. If in doubt about the version, contact us and we will check for you.