walker is a aftermarket exhaust manufacturer who's quality is ok. I purchases a cat from them for a Miata, and was not overly impressed. the bends were not mandrel bent. the welds were rather ugly, but the part performed as advertised. I would suggest going on e-bay or some other site and getting a new bosch or denso. I was able to, after a little searching, get a bosch o2 sensor for $70 new. by the way bosch is the oem type for Porsche.
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2005 Porsche Boxster S, 2000 Porsche Boxster 2.7L Base, 2000 Mazda Miata LS Supercharged, 2010 Toyota Tacoma TRD Off Road
Previous Vehicles: 2005 Ford Mustang GT, 1986 Alfa Romeo Spider, 1971 Alfa Romeo GTV, 1999 Ford Mustang
1977 Toyota Celica GT
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