Capristo 250-cell sports catalyst downpipe Audi S8 (D4) and S6/S7 (4G) 02AU09403013

*Fits 2012 – 2018 models (including S8 Plus)*

These high-performance sport catalytic converters feature a 100-cell-per-square-inch substrate made from the highest-quality materials currently available, designed to improve airflow to your vehicle and increase performance.

The cell count of a catalytic substrate refers to the number of holes per square inch and is a direct indication of that substrate's flow capabilities. The fewer the number of holes, the larger the hole needs to be to fill a square inch; a larger hole subsequently flows more exhaust gas.

All that high flow won't help if the substrate is "squeezed" into a small-diameter container or pipe. For this reason, CAPRISTO Sport Cats come in 5.2-inch packages to maximize exhaust gas flow and valved exhaust system operation.

The CAPRISTO valved exhaust system helps with low-end torque by providing exhaust backpressure and increasing temperature for proper catalytic converter operation. In the high-rpm, open-valve condition, it takes full advantage of the free-flowing characteristics of CAPRISTO Sport Cats, optimizing high-energy exhaust at the ideal temperature and backpressure for maximum performance.

These catalytic converters can easily be retrofitted to a CAPRISTO exhaust system or any system that fits directly over the OEM exhaust.

*Recommended for off-road and track use only*

Replacing the OEM catalytic converter may activate a Check Engine Light (CEL).