We can now supply a range of direct fit and universal performance catalysts to improve the performance of any vehicle. With stainless steel monoliths as standard they have cell density of 200 cells per square inch, rather than the 400cpsi of the standard aftermarket catalyst. This improves gas flow through the catalytic converter, and can boost performance by up to 15bhp. The stainless steel monolith gives extra longevity, especially on lowered vehicles.