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Subaru Impreza Exhaust System from Milltek Sport
 In conjunction with POWERSTATION we have created an exceptional system that meets the highest standards required by the new STI and their owners.
The STI’s already mighty power delivery is massively improved by achieving maximum boost a full 1,000rpm down the rev range.
This makes the car much more responsive giving you the power and torque where you need it most and dramatically improving driveability. The new sport exhaust maintains the standard STI boost parameters providing a quality solution with exceptional performance.
Our MY02 standard UK specification STI gained 30bhp+ after installing the Sports exhaust. It also achieved nearly 30% more power at the wheels across the rev range. On top of this the STI’s now legendary exhaust note has gained a subtle hard-edged rasp under full throttle without ever being intrusive on cruise. (Power Graph below)
The Hi-Flow CAT provides excellent flow characteristics and superb emission levels. Our system meets all current MOT and Police Noise and Emissions tests with ease.
Technical highlights include:
- 304 Austenitic Stainless Steel Construction
- Full Mandrel bent Pipe work
- Hi-Flow Sports CAT with extra heat shielding
- Laser cut finish
- Externally mounted brackets for better heat protection
- No boost problems
- No Check Engine Light (CEL) issues
Emission levels:
- CO Level 0.08% (actual) 0.30% (allowed) PASS
- HC Level 18 ppm (actual) 200 (allowed) PASS
- Lambda 1.0 (actual) 0.9 - 1.03 (allowed) PASS
- Engine idle CO 0.01% (actual) 0.50% (allowed) PASS
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