

HM Grade Universal-Fit Catalytic Converter, Round 2.5 in. Inlet, 2.5 in. Outlet
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Built for custom and universal-fit exhaust applications, this round-body catalytic converter requires cutting and welding into place, giving fabricators a code-compliant option for aftermarket exhaust builds. This converter meets Federal and EPA emissions requirements but does not carry a CARB Executive Order number, so it is not legal for sale or installation in California, New York, Maine, or Colorado.
MagnaFlow HM Grade Universal-Fit Catalytic Converter Features:
- Shape: Round.
- Body Dimensions: 4.375 in. (H) x 11 in. (L) x 4.25 in. (W).
- Inlet Inside Diameter: 2.5 in.
- Outlet Inside Diameter: 2.5 in.
- Inlet Type: Pipe Connection.
- Outlet Type: Pipe Connection.
- Grade Type: Regular.
- Substrate Material: Ceramic.
- Body Material: Stainless Steel.
- Overall Length: 15 in.
- CARB Executive Order Number: Not Applicable.
- CARB Certified: No.
- 50 State Legal: No.
- New York Certified: No.
Emissions Note:
This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for OBDII Federally registered vehicles with Federal/EPA Emission systems. This part is legal under the provisions of EPA's Tampering Policy dated November 23rd, 2020. The manufacturer has reasonable basis (test results) to verify that this product allows the vehicle to operate within legal emissions standards and is therefore legal to be sold for on-street use in 46 states.
This part is not legal to be sold or installed on vehicles in California, New York, Maine, or Colorado. These states require that aftermarket catalytic converters be granted an EO number from the California Air Resources Board (CARB) to be legally sold or installed on motor vehicles.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Magnaflow OBD-II Universal-Fit Federal Emissions Catalytic Converters are designed for engines built in 1996 or after. Each converter has a ribbed stainless steel body that minimizes expansion and distortion when the converter heats up. The ribs form a channel that protects the cushioning mat from direct exposure to exhaust gas and they hold the ceramic catalyst in proper alignment. An aluminized or stainless OE-style ribbed heat shield creates a rigid wall of protection against heat and adds to the structural stability of the converter. Magnaflow converters have a 1/2" lap-joint where the necks meet the body. The neck does not extend into the converter body where it could hamper exhaust flow. This is the strongest and smoothest flowing inlet/outlet joint of any manufacturer. A monolithic honeycomb catalyst is utilized. The ceramic is designed for maximum flow and surface area. The coating method is strictly controlled to maintain exact specifications.
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Selecting the Proper OBD-II Universal-Fit Catalytic Converter
Determine engine size and vehicle weight first. Converters are listed according to legal engine size and vehicle weight. Determine the type of converter being replaced. PRE OBD-II converters are for vehicles built before 1996. If the vehicle was built in 1996 or after, an OBD-II converter must be used. If engine has been changed and is not the same model year as the chassis, proceed as follows:
- If the engine is older than the chassis, select the converter according to the chassis model year.
- If the engine is newer than the chassis, select the converter according to the engine requirement.
Check whether the vehicle is Federal or California Emissions. Required by the EPA, this information is on the vehicle emission control information label (example shown below) located in the engine compartment in a visible position on the hood underside, shock tower, radiator support, fan shroud, or firewall.

Note: Federal emissions 49-state catalytic converters are not legal for sale, installation, or use on licensed vehicles in the state of California.
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