If you want your Miata to sound better and have a little bit more power, drop a few bucks on a system from Flyin’ Miata. It took me a couple of days to get the whole system in my 1999 1.8L, but it would have been lots faster if I’d known then what I know now, which is: Sasquatch is real, and he’s one hell of a mechanic. Kidding. He’s just okay.
Here’s the new exhaust, ready to go in. Ooh, fancy!
Unencumbered by training, experience, or the proper tools, I managed to get the system installed in my car. It’s a nice upgrade. Like one of those guns with a trumpet on the end of it, the Flyin’ Miata exhaust both sounds great and looks cool.
The biggest stumbling block I encountered during the process was the removal of the EGR (Exhaust Gas Return) tube. Here’s a video on how EGR systems work, if you’re interested.
On my car, the EGR tube is a metal pipe that, when off the car, looks somewhat like a bicycle handlebar. It runs from the rear of the exhaust manifold behind the engine block to the intake where it does, uh, science. Whatever that science is, the tube has to come off to get the stock exhaust header off your car, and to do that you’re going to need one of these things: a 22mm flare nut, or “line,” wrench.
Now you might be thinking, hey, Jimmyjams, couldn’t I just use a regular 22mm box wrench? And the answer is, well, maybe. And also it’s “James” because I don’t know you. There are two heater core hoses directly in the way, though. And your fitting is most likely rustier than Ringo’s drumming. And it’s been getting hot, then cold again for the life of your car, also like Ringo’s drumming.
There’s a danger as well that you might snap off your dipstick, which is a weekend ruiner in anyone’s book. If you use a regular wrench and even one of the EGR fitting’s corners is a teensey bit rounded, you’re gonna be left standing in your driveway with a shiny new exhaust still not installed, and maybe worse, your dipstick in your hand. So get the right tool.
Secondly, use a liberal amount of PB blaster or other bolt loosening agent. Users on the Miata forums I frequent recommended mixing up a concoction of 1/2 acetone and 1/2 automatic trans fluid, but I elected not to do that because I didn’t want to accidentally make methamphetamine, which would force me into a life of crime as Albuquerque’s drug kingpin. Sounds like a hassle.
I did spray pretty much everything in the vicinity of my car with enough PB Blaster to let a semi trailer back up a cat’s butt. You’re going to want to do this in a well-ventilated area unless you have brain cells to spare, or you want one of the neighbor kids to asphyxiate. Turn on a fan and save everyone’s health, I say.
Even with all that penetrating agent, I still couldn’t get the EGR tube off, though, because I was using one of these.
“But Jimothy, that’s a regular wrench, you complete teat. It ain’t a line wrench!” Yes, I know. But no one sells a 22mm line wrench even in a booming top 10 US Metropolis like Atlanta. You have to order it. Who has that kind of time? And it’s “James,” damn your hide.
It turned out that I needed a regular 22mm wrench anyway because the two O2 sensors, one pre-cat and one post cat, need a 22mm wrench to come off. Okay, fine, a line wrench would have worked there too. If I’d had one. Which I didn’t.
I got around the EGR problem by doing what the experts do: I Dremeled it off and bought another one from a Miata guy down the street. Cost me $30. Pretty sure the experts do that. Well, Sasquatch does. He told me.
The Dremeling didn’t end with the EGR tube, though. I also used it on the bolts on what Miata calls the “front” pipe (haha, front pipe). The fire extinguisher is for if Sasquatch gets mouthy with me. One clonk on the melon and he settles down real nice.
The stock exhaust has four pieces: Header, front pipe, mid pipe, and exhaust, whereas the FM system only has three. In the FM system, the front pipe is part of the header. The bolts between my stock header and my front pipe were beyond even the magical powers of PB Blaster, so I cut them off, being sure to shoot a generous amount of hot sparks directly into my eyeballs.
Once that was out and the EGR tube was sliced, getting the rest of the stock system out wasn’t too bad. The exhaust hangers are no match for a strong squirt of PB Blaster and a large pair of channel locks. I have a pair of these and they’re pretty fancy.
That done, all I had to do was stick the new header in, hook up the EGR tube, and bolt up the midpipe and exhaust. All of that was straightforward, and I was glad to be using new hardware.
My install was helped a little bit by the fact that I’ve replaced my stock airbox with a cone filter, which gives me some extra room in my engine bay, not to mention an added .0001 horsepower at the flywheel. It also sounds real nice, and it lets other car enthusiasts know that you aren’t afraid to throw money at a problem that doesn’t really need fixing.
Ain’t she shiny? This thing is going to look so good when people climb under my car, which is, well, probably never. But a neighbor cat might wander under there at some point and give it a gander. Or if I flip my car at the track, a corner marshall might be able to see himself as he runs over to laugh at me.
The only stumbling block during the FM system install was I didn’t know what to do with this little piece of science.
This is a gasket that comes with the Racing Beat header in addition to a couple of diamond shaped gaskets. The stock header has one in it too, so I didn’t know whether I needed both gaskets at the join between my new header and new midpipe, but I called Flyin’ Miata support on Monday morning, and they said that I did not need it. It’s just for putting the Racing Beat header into a car where you intend to retain the stock midpipe.
So that’s that! I took my car to the track for an event the very next weekend with this new stuff in it and I’m proud to say that I was last in my class just like I usually am. My car did sound better, though. No question about that.