Review on BBK 1770 Performance Catalytic Converters by Alfredo Testerman
Sounds great check engine light is out
This X-pipe with coils has been added to a 4.6L 3V Roush 427R. Keep the Roush axle rear exhaust. Kats and factory H-Pipes were also replaced. This setting was louder but not overwhelming, waking the neighbors up louder. Gave the car an aggressive growl. A simple screw assembly and the sensors are perfectly connected. Installation took about 1/2 hour with a lift and cold heads. I had no noticeable hum and the check engine light didn't come on.
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