AS,S.L.U., founded in 1973, is leader in Europe in the production of catalytic converters and particulate filters for the independent aftermarket.

 AS, S.L.U. has the widest catalogue with more than 1900 references in catalytic converters and particulate filters, covering more than 6000 petrol and diesel vehicle applications which meets the needs of  more than 90% of the vehicle park; including Euro 5 and 6 vehicles.

AS, S.L.U. produces all its products according to the current legislation (R-103) regarding the emission of gases, noise, back-pressure (power loss) and durability. The insulation mats are free of refractory ceramic fiber (RCF-free).

 AS, S.L.U. has its whole range available on our web catalogue (www.as-sl.com) and on Tecdoc, where it was one the first brands to achieve the "Premier Data Supplier" status.