Overview
The MagnaFlow 3391006 is a universal California catalytic converter with 2.5 in. tubing and a 2.5 in. inlet and outlet. It measures 11 in. long and 5 in. wide, with an 11 in. overall length. It is not air tube kit adaptable.
It fits a long run of 1980 to 1995 vehicles, mostly Chevrolet and GMC C/K pickups, S10 and S15 compact trucks, Dodge pickups and W-series trucks, Jeep Cherokee, Wagoneer and CJ models, and Isuzu and Nissan pickups. Confirm fit for your vehicle’s year, model and trim before ordering.
Key features
- 2.5 in. tubing and 2.5 in. inlet and outlet
- Universal California catalytic converter design
- Length 11 in., width 5 in., overall length 11 in.
- Not air tube kit adaptable
Choosing a replacement converter
A catalytic converter sits in the exhaust and treats engine gases before they leave the tailpipe. When one fails, the usual results are a check engine light, a drop in power or a rattle from the shell. Replacement choices come down to whether the converter matches the pipe diameter, the inlet and outlet positions and the overall length of the exhaust it will join. Universal converters suit a wide range of older trucks and custom builds, but they usually need some cutting, fitting and clamping to line up with the existing pipes.
Oxygen sensor placement is worth checking before buying. Many converters have sensor bungs at set positions, and a sensor that cannot reach the correct spot may read incorrectly. Exhaust hangers, clamps and gaskets often wear at the same time as the converter, so inspect them while the system is apart. Let the exhaust cool before working on it, and recheck clamp tightness after the first few drives.
- Measure pipe diameter at both ends before ordering
- Check hangers and clamps for wear
- Confirm sensor bung positions match
Specifications
| Brand | MagnaFlow Exhaust |
|---|---|
| Part number | 3391006 |
| Tubing | 2.5 in. |
| Inlet and outlet | 2.5 in. |
| Length | 11 in. |
| Width | 5 in. |
| Overall length | 11 in. |
| Air tube kit adaptable | No |
Vehicle fitment
The manufacturer fitment list includes 1980–1986 Chevrolet C10 models in Big Ten, Cheyenne, Custom, Custom Deluxe, Deluxe, Scottsdale and Silverado trims, along with many other Chevrolet, GMC, Dodge, Jeep and Isuzu entries from 1980 to 1995.
Vehicles outside 1980–1995 are not covered, and many entries apply only to certain years and trims. Confirm your vehicle’s year, model and trim before ordering.
What’s included
Clamps, gaskets and other hardware are not included. Check the package contents against your installation before starting.
