Performance catalytic converters use a lower cell count than a standard replacement unit, which reduces exhaust restriction and helps turbocharged engines spool faster and breathe more freely. They're a common upgrade for track cars, custom exhaust builds and modified turbo platforms, usually fitted alongside a cat-back exhaust system. We stock a range of cell densities from 200 cell right through to 100 cell for maximum-flow builds.

What cell count is best for a performance catalytic converter?

It depends on your goals. 200-300 cell units are a common street-performance choice balancing flow and emissions control, while 100 cell units are aimed at motorsport and heavily modified builds where maximum flow is the priority over filtering.

Will a performance catalytic converter cause my car to fail an emissions test?

It can, depending on your state's requirements and how low the cell count is. Lower cell-count converters filter less effectively than factory units, so it's worth checking local roadworthy and emissions rules before fitting one to a registered road vehicle.

Do performance catalytic converters increase horsepower?

They can contribute to a modest power gain by reducing backpressure, particularly on turbocharged engines, but the catalytic converter is usually only one part of a broader exhaust upgrade rather than a standalone power modification.

Are performance catalytic converters made from stainless steel?

Most quality performance converters use a stainless steel housing for corrosion resistance and longevity, with a ceramic or metallic substrate inside carrying the catalyst coating.