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Bellhorn OD 3
Stage 1 is defined as the calibration and airflow modifications that work within the factory boost
16-gauge mandrel-bent piping
increases in both horsepower and torque
The N54 responds to calibration work more dramatically than almost any other turbocharged engine of its era — a quality OTS map on 93 octane produces a transformation that BMW owners consistently describe as the single best modification they have made to the car
Torque Solution Valve Cover Cam Seals - Silver -2002-2006 Subaru WRX / 2004-2006 STI / 2004-2006 Forester XT / 2005-2006 Legacy GT PDM_oil-pumps Bellhorn OD 3Torque Solution 02 06 Subaru WRX STI LGT FXT Valve Cover Cam Seals SilverThis Part Fits: Year Make Model Submodel 2004 2005 Subaru Forester XT 2006 Subaru Forester XT Limited 2005 Subaru Forester XT Premium 2002 2006 Subaru Impreza WRX 2006 Subaru Impreza WRX Limited 2004 2006 Subaru Impreza WRX STI 2006 Subaru Impreza WRX TR 2005 2006 Subaru Legacy GT 2005 Subaru Legacy GT Limited 2006 Subaru Legacy GT spec. B