🚗 MagnaFlow 7in Round Center/Center Performance Muffler 12774 - Straight-Through, 5in Inlet/Outlet Diameter, 24in Body Length, 30in Overall Length, Satin Finish - Classic Deep Exhaust Sound: Find the Perfect Muffler for Enhanced Performance! Review

Based on my observations, this muffler did not provide any noticeable improvement to my automotive exhaust system. While it claims to reduce emissions and increase performance, I did not experience any of these benefits. The only pro is that it looks nice. However, the price tag is not worth it for a product that doesn't deliver on its promises. Save your money and look elsewhere for a more effective solution.

This is 12774 and a great muffler but too long for my car and I had to get the shorter version instead, 12771. Otherwise it's a great muffler which would have cut the sound a few more decibels . Had to reluctantly send back to get a shorter version. Both are highly recommended, but 12774 is quieter.

Well I was quite surprised to see that the 5" Magnaflow resonator was narrowed to 4" across the entire resonator. Contacted Magnaflow and never received any information. Mounted on ISM Cummins 450 hp. Timed out waiting for a reply and installed anyway. This probably won't be a problem, but it seems to me that this should be disclosed as the 4 inch limit. That sounds good. Definitely a five star component and very nicely built. There were a few shipping dents on the outside and one end was bent…