2010 Cadillac STS Catalytic Converters

Genuine GM catalytic converters for the 2010 Cadillac STS, at wholesale prices. Converters are emissions parts, and the substrate loading has to match what the ECM expects from the downstream oxygen sensor. Sigma platform rear-drive sedan, offered with the Northstar V8 and in supercharged STS-V form.

How you know

A P0420 code, rattling from underneath, or a failed emissions test. On a full-size car, option packages divide this group more than the model year does.

Why order factory

• We catch the wrong part before you do. VIN verification is free on every catalytic converters order.
• Fast out the door. In stock catalytic converters ship within hours, not days, from Dallas.
• No hassle returns. If the catalytic converters is not right, send it back.
• Warranty intact. OEM catalytic converters keep coverage that an aftermarket part can void.
• Wholesale pricing. Most catalytic converters numbers land well below dealer list.

Confirming fitment

Materials and coatings are specified, not approximated, which is why factory parts last through more heat cycles. Check the VIN before ordering anything that has to bolt to something else. Shipping is calculated on real weight and distance, which usually beats a padded flat rate.