Hey guys! I am pretty new to this forum. I bought my G37S coupe back in August. When i bought the car, it had a full Magnaflow exhaust. It sounded awesome! Nice deep sound and no rasp.

Well since then i bought Z1 test pipes. After the long and stressful installation of the test pipes, the car does not sounds as good as i thought. i knew that there is going to be a lot of rasp and that is ok not the problem. The problem i am running into is that whenever i let off the gas at any speed, the exhaust has a very loud squealing sound. I took it to my exhaust guy thinking that maybe something was loose and it was rattling but after looking under the car everything seemed fine. I also took my car to Forged and they said another guy had the same issue with Magnaflow.

Has anyone here ever heard of that? I am willing to buy a new exhaust. What is a good setup that will go good with the Z1 Test pipes? And last question, could i get away with just buying an axle back and using the same tubing that i have now?


Any and all help will be greatly appropriated!


thanks in advance!

 

Go with F.I

 

Will that solve my problem with the test pipes?

 

Any other suggestions?

 

Test pipes on a N/A car are going to be fairly loud and raspy, resonated test pipes or high flow cats would have been a better option.

 

Thanks for the tip! So if i were to get some resonated test pipes would that make the "hissing" noise go away? And do you think my Magnaflow exhaust would be fine to keep?