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Silent Hi-Power mufflers are constructed entirely of SUS304 grade stainless steel for high lustre
only order if willing to wait
2011-2014 Subaru WRX STI Sedan:
Ideal for those building a big boost and big horsepower engine
Cobb Stg 1+ Drivetrain Pkg (Tall Weighted Knob) - White - 2004-2021 Subaru STI 6MT PDM_lateral-links Silent Hi-Power mufflers are constructedThe Uppipe: The Restriction Between the Engine and the Turbo The Cobb Stainless Steel Uppipe for the Subaru replaces the restrictive factory unit between the exhaust manifold and the turbocharger. The factory uppipe contains a flex section that collapses over time and a catalytic converter that restricts exhaust flow before it reaches the turbine wheel. The Cobb uppipe removes both restrictions, improving exhaust gas flow to the turbine and reducing
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