I have just been informed that our cars require an ODB-II computer compliant catalytic converter for cars in California.

Earlier I suggested several brands of 2 1/2 inch or 3 inch high-flow catalytic converter in order to upgrade your exhaust system. So far, only DynoMax and Magnaflow aftermarket catalytic converters are OBD-II Compliant.

Universal Cat-Co 3-way free-flow Cat from Summit
http://store.summitracing.com/defaul...7&autoview=sku
I cannot find any info stating that this cat-converter is ODB-II compliant in California.

Universal Dynomax 3-way free-flow Cat
http://www.discountconverter.com/
http://www.discountconverter.com/news/obdii.htm
Many sellers of converters over the internet DO NOT USE OBD II compliant converters...so buyer beware!! Discount Converters, Ltd uses only OBD II approved converters in all so designated vehicles.

OEM and Universal Stainless Steel 3-way free-flow cat
http://www.randomtechnology.com/
Please note that aftermarket catalytic converters are not legal for installation in California on OBD II vehicles (some 1994 & 1995, and all 1996 and later vehicles

http://www.magnaflow.com/02product/02converters.asp
Car Sound Exhaust System, LLC., the parent company of MagnaFlow Performance Exhaust is a world leader in the manufacturing of automotive catalytic converters. The production and design techniques of our catalytic converters contribute to Car Sound’s standing as the highest quality and best-valued products on the market.

http://www.car-sound.com/catalog/universal/430.aspx
MagnaFlow's California 43000 Catalytic Converters are the first series of a new line of converters designed for use on vehicles equipped with Second Generation On-Board Diagnostic (OBDII) systems. They are designed, tested, and catalogued for specific vehicles. They are not traditional universal converters. These converters have higher efficiency than conventional strict California requirements for conversion efficiency and durability. These converters are warranted for 5 years or 50,000 miles on the converter body and 5 years on the performance of the internal catalyst, including replacement for OBDII diagnostic codes for low catalyst efficiency.