HomeExhaust > Catalytic ConverterAP Exhaust 772778 Catalytic Converter - Rear
Part #: 772778

AP Exhaust 772778 Catalytic Converter - Rear

GNSXV02.5G5A, Rear
⚙️ 13 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦GNSXV02.5G5A, Rear
🚗Fitment: Nissan, Altima
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Overview of AP Exhaust Catalytic Converter 772778

The AP Exhaust catalytic converter part number 772778 is designed specifically for Nissan Altima models. Engineered with durable stainless steel and a ceramic substrate, this carb compliant direct-fit converter ensures reliable emission control and long-lasting performance.

  • Constructed from corrosion-resistant stainless steel body
  • Carb compliant direct-fit design for Nissan Altima
  • Equipped with two O2 sensor ports for accurate emissions monitoring
  • Includes inlet and outlet gaskets for proper sealing
  • Features a 3 bolt welded flange inlet and 2 bolt welded flange outlet
  • Overall length of 48.5 inches for precise fitment
  • Certified under Executive Order D-798-9

Detailed Product Description

This AP Exhaust catalytic converter, part number 772778, is built to meet strict emissions standards while providing a direct replacement for Nissan Altima vehicles. The stainless steel body offers resistance to rust and corrosion, extending the life of the converter. Inside, a ceramic substrate efficiently converts harmful exhaust gases into less harmful emissions. The converter includes two O2 sensor ports, allowing for proper sensor installation and accurate engine management system feedback.

The inlet side features a 3 bolt welded flange with a gasket stub, while the outlet side has a 2 bolt welded flange, both designed to ensure a secure and leak-free connection. The included inlet and outlet gaskets help maintain a tight seal during installation. With an overall length of 48.5 inches, this catalytic converter fits precisely within the exhaust system of compatible Nissan Altima models.

About the 7NSXV02.5G5A Product Line

The 7NSXV02.5G5A product line from AP Exhaust focuses on carb compliant direct-fit catalytic converters. This line is engineered to provide exact fitment and compliance with emissions regulations, making it suitable for vehicles requiring Executive Order certification such as D-798-9. The converters in this line utilize high-quality stainless steel and ceramic substrates to balance durability and performance.

Common Applications and Problem Solving

  • Replacement for failing or clogged catalytic converters in Nissan Altima
  • Restores proper emissions control to pass state and federal inspections
  • Eliminates exhaust leaks caused by damaged flanges or gaskets
  • Improves engine performance by ensuring accurate O2 sensor readings
  • Addresses check engine light issues related to catalytic converter faults

Installation Notes and Tips

This catalytic converter is designed as a direct-fit replacement for Nissan Altima models, simplifying installation. It includes inlet and outlet gaskets but does not come with installation hardware. Ensure the mating flanges and exhaust pipes are clean and free of debris before installation. Proper torque on the flange bolts is essential to prevent exhaust leaks. Verify O2 sensor port alignment to avoid sensor damage during installation.

Quality Assurance and Compliance

AP Exhaust catalytic converter 772778 is manufactured under strict quality controls and meets Executive Order D-798-9 certification requirements. The stainless steel construction and ceramic substrate materials are selected for durability and emission efficiency. This part is backed by AP Exhaust Holdings, LLC, ensuring compliance with emissions standards for Nissan Altima vehicles.

BrandAP Exhaust
Part Number772778
PositionGNSXV02.5G5A, Rear
Body MaterialStainless steel
Executive OrderD-798-9
Inlet GasketYes
Inlet HardwareNone
Inlet Type A3 bolt welded flange w/ gasket stub
Issued CompanyAp exhaust holdings, llc
O2 Sensor Ports2
Outlet GasketYes
Outlet HardwareNone
Outlet Type A2 bolt welded flange
Overall Length (IN)48.5
Substrate MaterialCeramic
TypeCarb compliant direct-fit

This part fits 13 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
2016NissanAltima2.5LL4RearDirect Fit - California; GNSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; GNSXV02.5G5A; GNSXV02.5G5A
2015NissanAltima2.5LL4RearDirect Fit - California; FNSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; FNSXV02.5G5A; FNSXV02.5G5A
2014NissanAltima2.5LL4RearDirect Fit - California; ENSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; ENSXV02.5G5A; ENSXV02.5G5A
2013NissanAltima2.5LL4RearDirect Fit - California; DNSXJ02.5G5B; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; DNSXJ02.5G5B; DNSXJ02.5G5B
2013NissanAltima2.5LL4RearDirect Fit - California; DNSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; DNSXV02.5G5A; DNSXV02.5G5A
2012NissanAltima2.5LL4RearDirect Fit - California; CNSXJ02.5G5B; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; CNSXJ02.5G5B; CNSXJ02.5G5B
2011NissanAltima2.5LL4RearDirect Fit - California; BNSXJ02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; BNSXJ02.5G5A; BNSXJ02.5G5A
2010NissanAltima2.5LL4RearDirect Fit - California; ANSXJ02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; ANSXJ02.5G5A; ANSXJ02.5G5A
2009NissanAltima2.5LL4RearDirect Fit - California; 9NSXJ02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; 9NSXJ02.5G5A; 9NSXJ02.5G5A
2009NissanAltimaSedan2.5LL4RearDirect Fit - California; 9NSXJ02.5G5A; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; 9NSXJ02.5G5A; 9NSXJ02.5G5A
2008NissanAltima2.5LL4RearDirect Fit - California; 8NSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; 8NSXV02.5G5A; 8NSXV02.5G5A
2008NissanAltimaSedan2.5LL4RearDirect Fit - California; 8NSXV02.5G5A; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; 8NSXV02.5G5A; 8NSXV02.5G5A
2007NissanAltima2.5LL4RearDirect Fit - California; 7NSXV02.5G5A; ALL; Legal Note: In Compliance with California Emissions Requirements; EO Number : D-798-9; 7NSXV02.5G5A; 7NSXV02.5G5A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.