AP / EASTERN markets and sells their catalytic converters under both AP EXHAUST and EASTERN CATALYTIC. The product inside the box is the same, no matter what brand name appears on the box.
AP / EASTERN 850254 Specifications
Executive Order
D-665-1
Overall Length (IN)
39.5
Outlet Type A
3 BOLT WELDED
Outlet Gasket Qty
1
O2 Sensor Ports
1
Inlet Type A
4 BOLT WELDED
Inlet Gasket Qty
1
C.A.R.B. Compliant
AP Exhaust's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency while their latest advanced-manufacturing technology ensures that all converters are built to exact OE dimensions and fit.
Features & Benefits:
Featuring Aristo Clean by Design® advanced catalyst technology to handle the toughest emissions problems
Increased precious metals loadings for lower emissions output
Improved O2 storage and release with exact O2 sensor location(s)
Keeps the MIL light off
409 stainless steel shell and neck construction for longer life
Hardware included (where shown in product image) provides for faster and easier installations
Determine your Engine Family Number to make sure you order the correct replacement converter.
Have You Fixed the Problem that Caused your OEM Converter to Fail?
Catalytic Converters are designed to last the life of your vehicle – they do not fail on their own. It is important to fix the source of the problem before replacing your OEM converter. There are three major reasons a converter fails:
OVERHEATED / MELTED
Often caused by unburned fuel entering the converter from a faulty:
Spark Plug
Exhaust Valve
Oxygen Sensor
Fuel Injector
Burned Converter
CATALYST POISONING
Often caused by exposure to emissions substances from:
Leaky Cylinder Head Gasket
Silicone-Based Sealant
Improper Fuel (E85, Diesel)
Worn Piston Ring / Valve Seal
Oil Fouled Converter
STRUCTURAL DAMAGE
Often caused by road debris, corrosion or other conditions such as:
Have You Fixed the Problem that Caused your OEM Converter to Fail?
Helpful Tools: 
Videos
Additional Resources