Overview
The MagnaFlow 3391004 is a universal California catalytic converter with a 2 in. inlet and outlet, an 11 in. length and a 5 in. width. It is designed to fit a broad range of 1975–1995 trucks and SUVs rather than one model, and it is not air tube kit adaptable.
Listed vehicles include Chevrolet S10 and GMC Sonoma, Ford Ranger and F-Series, Dodge Dakota and Ram 50, Jeep Cherokee XJ and Comanche, Land Rover Discovery and Range Rover, Mazda B-series, Mitsubishi Montero, Nissan D21 and Pathfinder, Suzuki Samurai, and Toyota 4Runner and Pickup.
Key features
- Universal design with a 2 in. inlet and outlet
- Overall length 11 in. and width 5 in.
- Not air tube kit adaptable
- Broad fitment list covering 1975–1995 trucks and SUVs
Universal converter fit and cutting
A universal converter is built to fit many vehicles, but the exhaust layout of each vehicle still decides whether it sits correctly. The 2 in. pipe size is common on older trucks, yet flange positions, hanger points and floor clearance vary. Mock up the converter in place before cutting the old section so the new part lines up without strain.
Because this converter is not air tube kit adaptable, the existing pipe must be modified to join it. Plan to cut at a straight section, deburr the cut edges and dry-fit the joints. Keep the oxygen sensor placement in line with the converter’s inlet, since sensor readings depend on proper exhaust flow.
- Mark the cut line and check clearance before cutting
- Use new gaskets and flange hardware at every joint
- Support the converter so it does not stress the pipe
- Inspect the heat shield for damage after the first drive
Specifications
| Brand | MagnaFlow Exhaust |
|---|---|
| Part number | 3391004 |
| Inlet and outlet | 2 in. |
| Length | 11 in. |
| Width | 5 in. |
| Overall length | 11 in. |
| Air tube kit adaptable | No |
Vehicle fitment
The manufacturer fitment list is long and covers 1975–1995 models, including the 1994–1995 Chevrolet S10 in Base and LS trims, the 1994–1995 Dodge Dakota, and many Ford, Jeep, Toyota and Land Rover entries. The full list is shown on the Fitment tab.
Vehicles outside the listed years and models are not covered. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
The 2 in. inlet and outlet must match your exhaust piping, because this converter is not air tube kit adaptable. Wait for the exhaust to cool before working on the pipes.
What’s included
Clamps, gaskets and flange hardware are not included.
