PART NUMBER: 61-1933
Special version of SuperQ with added 3.5 inch diameter resonator on the inlet to kill the RASP that is added with adding a standard length highflow header to the ND. Otherwise similar to normal SuperQ, see our standard SuperQ product description for more. STRONGLY recommended for those getting a header!!
Brian's Application Notes: This is the cure for raspy sounds unleashed by a catless performance header, an extra resonator on the inlet pipe you can just barely see in the pictures is the secret sauce of this version. If confused by your choices, give us a call or drop us an email to discuss. This muffler is proudly made in the USA with a LIFETIME WARRANTY and is emissions legal in all 50 states. Our pipe size is bigger than OEM for best performance/flow and the stock donut gasket sinks a bit deeper into the mouth of our setup than with factory muffler 'mouth'. Note that our flange at entrance to muffler is designed as a dual purpose item that allows going to flat gasket if you later go with our 2.5 inch midpipe, at which point the midpipe has a flex joint to replace function of the donut and you get a clean 2.5 inches of flow all the way, which is not possible if we stay same small pipe of stock muffler.
Installation of this Miata exhaust is SUPER EASY...just two 14mm bolts to loosen! When you open the big box you will find separate foam wrap on the exhaust tip, leave that foam around the tip during your install to protect the polished tips and your car's soft plastic in the exhaust cutout. Use gloves. Note the 'bolts' from the factory are actually studs with springs and nuts and the factory usually jams the nuts on so hard that unbolting it will bring the stud out too. If that does not happen then use a 13mm long socket to pull the stud, or use jam nut technique where both nuts are put on one stud against each other and then wrench used on the inner of the two to back out the stud. Then lube up the stock exhaust hangers with dish soap and yank stock muffler back and forth to work the soap into the rubber hangers and then the muffler will slide off those rubber hangers easily. Then hang the new muffler on the wet and soapy rubber hangers and torque 'bolts' with the springs back in place to 30ft/lbs. Now you can remove foam tip wrap. Option to remove the baffle too, to do so loosen bolt that holds it from under the exhaust tip and use it as handle to shake the baffle loose and then unscrew bolt the rest of the way and pull the baffle (pulling baffle raises the sound slightly). If you don't pull the baffle, put a socket on the nut and double check it is properly torqued before you drive (with lock washer just 15 ft/lbs is plenty, don't overdo it). Note the muffler to midpipe joint is a ball socket connection for the first time on a Miata, it is designed to move a lot, so please do not add sealants that will gum up that dry ball socket joint. Note that our flange at entrance to muffler is designed as a dual purpose item that allows going to flat gasket if you later go with our 2.5 inch midpipe, at which point the midpipe has a flex joint to replace function of the donut and you get a clean 2.5 inches of flow all the way, which is not possible if we stay same small pipe of stock muffler.Picture showing extra resonator with red arrow for SuperQ Header Version that is the key to crushing the rasp sent down the tubes with catless header upgrades.
Okay, I have had the exhaust kit for a total of two days. I LOVE IT! Soft sound to almost no sound when cruising, nice racy burble when I step on the peddle. I bought the complete kit with the header to muffle change out. The motor seems to run much more smoothly and I have noticed an increase in acceleration esp. in 3rd and 4rth gear. Now I am going to be nit picky.
First off, I love the kit, overall the kit is an easy install and when I called Goodwin with the few questions I did have, they were able to talk me off the ledge. I am a first time installer, I have worked on cars to some degree most of my life here and there, but don't do this kind of thing daily. Here are my super duper nit picky criticisms.
1. It would be helpful to have at least a .pdf with photos, installation instructions, and torque specs in the kit or online somewhere.
2. The kit has MANY different sized heads for the bolts and nuts, all together with bolts on the car, you will need a 10mm, 12mm, 14mm, 15mm, 16mm, 18mm, and a 22mm, whew that's a lot of socket changes. Just wonder if they could make the bolts and nuts that attached the header and the muffler all the same size?
3. FYI the collar between the midpipe and muffler needs to have the nuts oriented near the top of the pipe and facing the drivers side of the car if you don't you will hit the bracing on the body when you reinstall the bracing....ask me how I know LOL.
Step 1 of my complete exhaust build (headers, mid-pipe, muffler). The install was easy. It sounds more robust, but not much louder than the stock exhaust (no baffle). I removed the baffle and noticed some scuff marks on the inner exhaust pipe near where the baffle bolts to the tip; not a big deal since it will be covered by dirt soon, but something that bothers me slightly whenever I spot it.
I purchased all three separately and once I got them all installed and my tuning done it feels like a different vehicle. I have the header mid pipe and exhaust from the super Q header kit and the difference in performance is amazing. I had a cheaper exhaust system that I made the mistake of mine and I had to pull it out to put this one in and I really am glad that I did.
The system that I wound up pulling out and essentially throwing away was quite literally the cheapest one you can buy on the market and you could hear me coming from two blocks away. It was fun for the first day and then it became abrasive. If you're going for that super loud racer boy sound then I recommend getting the full kit that is with the regular super Q exhaust it will probably be much louder. This exhaust along with the 5-inch mid pipe and header gives you a throaty rich sound. It makes the car sound like it should have sounded or I should say for myself exactly how I think it should sound. Perfect.
When you pull the muffler out of the box you going to say damn this is nice. It's really well-built and has the feeling of quality when you hold it. There's a difference between something being heavy and something being quality. I can hand you something that's heavy and you can hold it say this is a piece of garbage or I can hand you something that's light and you can say this is a piece of garbage. When I was installing my super Q exhaust I was amazed by how light it was and how it still felt rugged and well-made as if it was much heavier.
Just by the header kit that comes with a header 5 inch mid pipe and exhaust at one time it winds up being cheaper for the set. Make sure you get the kit that has the five inch mid pipe.
I was contemplating getting a supercharger but after doing the full exhaust kit with the 5-inch midpipe. After doing my ecutek tuning and running on 93 octane I just don't feel like I need it anymore. The car is much faster snappier and quicker off the line with just what I've done so far.
Swapped from Race muffler to this because I installed a header with a tune. Almost the same sound effect as Race has but much quieter, and droning is much better, now I can easily rev up to 4-5k rpm without pissing off my passenger too. Usually I drive with the unpacked baffle off for daily and trip less than 2 hours, still pretty loud when you go higher than 80mph so I guess I will get a packed baffle for a longer trip.
This was a snap to install and despite the claims of increased volume, I noticed no increase from the addition of this pipe over the stock mid pipe and GWR SuperQ Twin tip setup I had in place. Still has the wonderful deep sound and was a perfect match to the BBR Stage 1 Turbo I just installed.
This exhaust is absolutely worth it. I bought the Super Q Header Version along with the MaxMidpipe as part of a long term plan that will include a header and may eventually end in a Supercharger. I'm waiting on the next delivery of midpipes so, in the meantime, I bolted the SuperQ up to my stock midpipe (installation was super easy thanks to a little soapy water on the hangers). I thought it would be a fun experiment to hear the changes as I add each component. This review is for the Super Q only. No other exhaust components yet. This exhaust produces a very satisfying, deep tone, and is so mellow by itself that I'm currently running it with no baffle. I live in a quiet cul-de-sac of retirees and I have zero concerns about waking anyone up when I leave for work. But when I drop the pedal I get a beautiful, throaty sound without any annoying drone on the freeway. I like it so much I immediately did the sound tube delete so nothing takes away from my exhaust note. I highly recommend this exhaust to anyone looking for a more aggressive sound without being loud or raspy.