March 24, 2010
Magnapacks on 2010 Mustang GT
Just installed these today. Took a lot longer than I expected, but it's done. Let me start by saying there is no black "Magnaflow" outlined wording on these, unlike the official photo. They do say Magnaflow, but they are just etched and you need to be close to see it.
Now for the installation... I did this myself in the driveway, witht the rear tires up on ramps. Plenty of room to work. The instructions said to just loosen the pipe clamp on the back of the factory muffler and pull it off. I found that was impossible and had to take off (unbolt) all the factory hangars. My first real problem came when I got the first Magnapack loosely fitted. It was too high, touching the top of the plastic fascia. So I had to take it all apart and bend one of the muffler hangars up and then put it all back together. Then, when I had it all good and was tightening the clamp bolt, I discovered that it was as tight as possible but the pipe was still loose! Must be a bad clamp... I called Magnaflow and asked for a new pair overnighted. They would only send one and it would come ground! Like hell I am going to wait for that... I took it apart again and installed the other clamp, put it back together, and then it tightend up fine. Ok, one down.. I took some parts from one of the factory clamps and used it to fix the bad magnaflow clamp. I then installed the other oem muffler. At first I thought something was totally screwed up when it seemed WAY off and impossible to connect correctly, but it turns out the exhaust hangars on that side can install multiple ways and I just had them wrong. Fixed that, and then noticed this muffler was also too high and had to take it apart and bend that musffler hanger too. Finally got it all together and tight, and it looked pretty good. It's importanrt to note that any muffler for sale on American Muscle that says it is for "05-10 GT" will not fit correctly on a 2010! The 2010 model fascia is 1" longer than previous years. If you put on mufflers that are designed for a 2005-2009, it will be too short and will eventually melt the plastic. Plus it won't look as good as mufflers espically sized for a 2010, like the 16574 Magnapacks I am reviewing here. These look great. They stick out just as far as the OEM's do, if not a little farther. They also appear to be slightly larger diameter than OEM, and have a thicker appearing, tapered inner sidewall. These mufflers are straight through design, like cherry bomb glasspacks. They give the car a deeper, richer tone. When idling, they are slightly louder and deeper sounding than stock. When taking off with a light foot, they are a little louder (and much deeper) than stock. When taking off hard or accelerating hard, they are definately much louder than stock. When full throttle, you notice the most difference.
When installing these, I noticed that the stock muffler-to-Hpipe pipes were extremely cheaply made. One of them looked liked the factory struggled to fit it in and is almost s-shaped when it should be straight! And both of them, where they are bent to go over the rear end and sway bars, are bent in a way that the inner diameter is severly squeezed, almost to half the diameter they should be (2-1/2"). After seeing that, I wished I had waited until I could afford the full Magnapack set that includes the SS pipes... I am hoping that I can find just the pipes somewhere in the future, as they don't seem to offer just the pipes for people that bought only the mufflers previously.
Well overall, I am happy I have these now. I wanted something louder and deeper than stock, but not so loud as to draw a lot of attention (unless I want it). These seem to be the ones. The next step up from these are high flow cats, x-pipe, and x-pipe to muffler pipes, or else doing a muffler delete set. I think the muffler deletes would be too loud so I will stick with these Magnapacks and possible upgrades as mentioned.
I hope you guys find this review helpful, I cetainly enjoyed the info I read in reviews when researching a new exhaust, and I wanted to give back..