About three weeks ago I replaced my stock headers, stock H-pipe and dynomax catback with BBK 1 5/8 unequal shorties, BBK H-pipe with cats and Flowmaster Catback (all 2.5").
The engine is basically stock except a BBK CAI and 9mm plug wires. AOD transmission.
I had to shimmy the driver side motor mount with 3 washers to raise it off the steering arm. I switched to locking bolts on the headers to keep them from backing out (they backed out once and fried the gaskets).
I am feeling a strange vibration around 2300 / 2500 RPMs. I have taken it to two mechanics and two muffler shops. They cannot find anything wrong with it and tell me everything is tight, nothing is rubbing up against anything else.
I had the muffler shop cut the hangers from the transmission today to see if that would fix it, nothing.
My last idea is to have the motor mounts replaced (could that be the probelm)?
Any ideas on anything else I can check or what this could be. It did not do this under the old setup.
The engine is basically stock except a BBK CAI and 9mm plug wires. AOD transmission.
I had to shimmy the driver side motor mount with 3 washers to raise it off the steering arm. I switched to locking bolts on the headers to keep them from backing out (they backed out once and fried the gaskets).
I am feeling a strange vibration around 2300 / 2500 RPMs. I have taken it to two mechanics and two muffler shops. They cannot find anything wrong with it and tell me everything is tight, nothing is rubbing up against anything else.
I had the muffler shop cut the hangers from the transmission today to see if that would fix it, nothing.
My last idea is to have the motor mounts replaced (could that be the probelm)?
Any ideas on anything else I can check or what this could be. It did not do this under the old setup.