Pre muffler question

[85eurocarrera]

I believe I have an m&k pre muffler...bought it here used. The one I took off looks to be cheaply made. I noticed my new one has a larger diameter round pipe compared to the one I removed. ~57mm compared to ~49mm of the cross over pipe coming off the car. '85 ROW carrera.

I did a test fit and everything lines up...better than what I had. Do I need to worry about the difference in pipe diameter?

Thanks.

[McLovin]

No.

[DRACO A5OG]

You should be fine, if cross over is OEM. Just remember not to over torque the bolts/nuts. Spec is 18 ft lbs or you will warp the flanges and cause a leak. Use new gaskets.

[uwanna]

Originally Posted by 85eurocarrera

I believe I have an m&k pre muffler...bought it here used. The one I took off looks to be cheaply made. I noticed my new one has a larger diameter round pipe compared to the one I removed. ~57mm compared to ~49mm of the cross over pipe coming off the car. '85 ROW carrera.

I did a test fit and everything lines up...better than what I had. Do I need to worry about the difference in pipe diameter?

Thanks.

The new piece you aquired is a TRUE premuffler which has an expansion tube part with a baffle in it , your old one is nothing but a Cat bypass PIPE.
Your much better off with the new one, "you done good"