Catalytic Converter for 2002-2006 Nissan Altima/Sentra 2.5L Direct-Fit Stainless Steel High Flow Series (EPA Compliant)

Legal Disclaimer

Non C.A.R.B Compliant - Not legal for use on vehicles required to meet California emission standards.

The benefits of high flow catalytic converter
Features stainless steel outer shell construction for maximum durability. The internal substrates and precious metal loading have been carefully engineered for maximum efficiency and to avoid MIL code issues.
Internal honeycomb structure for maximum flow and surface area. Allows the catalysis to fully react with exhaust gases without sacrificing flow rate, thus reducing the back pressure.
The increased exhaust flow allows your engine to make more power, improve vehicle performance.
High Exhaust Flow
Reduce Back Pressure
Improve Vehicle Horsepower

Vehicle Fitment
Nissan Altima
2002-2006 (Except 2005) Nissan Altima Base Sedan 4-Door 2.5L
2002-2006 Nissan Altima S Sedan 4-Door 2.5L
2002-2006 Nissan Altima SL Sedan 4-Door 2.5L

Nissan Sentra
2003 Nissan Sentra Limited Edition Sedan 4-Door 2.5L
2004 Nissan Sentra S Sedan 4-Door 2.5L
2002-2005 Nissan Sentra SE-R Sedan 4-Door 2.5L
2002-2005 Nissan Sentra SE-R Spec V Sedan 4-Door 2.5L

About Check Engine Light On
Most vehicle owners care about if this catalytic converter can eliminate the check engine light on caused by code P0420 - catalyst system efficiency below threshold.
We would answer definitely YES! But before replacing a catalytic converter, please make sure your O2 sensors still work well. Faulty sensors can cause damage to spark plugs, catalytic converters and damage your fuel economy.

Replacement Guide (Do It Yourself)
Raise the vehicle and secure it on jack stands.
Identify the catalytic converter on the underside of the vehicle.
Remove the oxygen sensors.
Spray penetrating oil on the exhaust flange hardware and flanges, then remove the Old Catalytic Converter.
Install new catalytic converter, direct bolts to existing exhaust system - Do not forget to install gaskets to prevent exhaust leaks.

High Flow Cats Increase Power
The problem with regular catalytic converters is that they don?ˉt always allow the gasses to pass through as efficiently as possible.
High flow catalytic converters allow for the more efficient flow of exhaust gasses, removing restrictions that can impede performance.
If the original OE converter does not match your engine power, a high flow cat might be a great choice.