Catalytic Converter for Honda Accord (2003-2007) 3.0L Rear

Direct-Fit Rear Catalytic Converter for 2003-2007 Honda Accord

What it Does: The rear catalytic converter replaces the compromised underfloor emissions unit on the 2003-2007 Accord to eliminate catalyst efficiency trouble codes and restore proper exhaust scavenging across the powerband.

The Stock Honda Accord Exhaust Degradation

Factory underfloor converters on the 7th generation Accord suffer thermal breakdown after repeated thermal cycling and prolonged engine run times. Over years of operation, oil vapor blow-by and rich-mixture conditions degrade the factory ceramic washcoat on the J30A4 and J30A5 engines. This leads to matrix crumbling, internal clogging, and subsequent exhaust backpressure spikes that stifle top-end VTEC flow while triggering persistent P0420 diagnostic trouble codes.

The Engineering Solution

Engineered as a bolt-on solution for the underbody exhaust channel, this rear assembly utilizes a corrosion-resistant stainless steel shell mated to a durable, flow-optimized ceramic substrate. Laser-cut, thick-gauge connecting flanges prevent exhaust leaks under vibration, maintaining structural integrity across severe thermal expansion cycles. Precision-welded mounting brackets align directly to the factory isolated hanger pins for standard OE-location fitment without cutting or custom fabrication, matching OE interchange 16351 specs.

Technical Specifications

Compatibility

• 2003-2007 Honda Accord EX 3.0L V6 (Sedan & Coupe)
• 2003-2007 Honda Accord LX 3.0L V6 (Sedan & Coupe)
• 2005 Honda Accord SE 3.0L V6
• 2007 Honda Accord Special Edition 3.0L V6

Frequently Asked Questions

Does this fit the CM6/CM8 Accord?
Yes, this is a direct fit for the 2003-2007 Honda Accord equipped with the J30A4 or J30A5 engine.

Will this converter resolve an active P0420 code?
Yes, its fresh precious metal washcoat restores internal chemical conversion efficiency to OEM thresholds, allowing downstream sensors to register correct emissions parameters.

The Honda Standard

Maintain the clean revving signature and linear throttle response Honda built into the V6 platform without raspy acoustic drone or restricted exhaust flow.