Goodwin-Racing RoadsterSport SuperStreet Exhaust - DYNO TESTED // (ND, 2016+) Mazda MX-5 Miata

Find out how much horsepower & torque the Goodwin-Racing RoadsterSport SuperStreet Exhaust makes as we DYNO TEST this popular aftermarket Miata axle-back exhaust on our project car, the 2019 Mazda MX-5 Miata RF GT-S! How much HP & TQ can an aftermarket exhaust add to our ND / ND2 (2016, 2017, 2018, 2019, 2020, 2021) Mazda Miata project car make? We dyno test several aftermarket performance exhausts on our 2019 Mazda MX-5 Miata RF on a DYNOJET DYNO as part of our multi-video Miata exhaust comparison series. We'll routinely dyno test our Miata RF as we embark on our Miata modification journey, starting with Miata aftermarket exhausts and midpipes from Goodwin Racing, the Goodwin Racing Roadster Sport Super Street exhaust, and the Greddy, the Greddy Supreme SP exhaust.
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[@jeffwertz2953]

Thanks! Very helpful info. I just received my Goodwin-Racing RoadsterSport SuperStreet today for my 2020 RF. Construction and quality look great.

[@TheLemonFactor]

Nice! Good luck with the install, it’s relatively straight forward.

[@fredmthomas]

Were stock pulls and other exhaust pulls done on the same day at the same temps?

[@tonywongreview]

Hi Chad, thank you for this great review and keep up the good work..

[@TheLemonFactor]

Thank you for the support, Tony!

[@patrickmcdaniel2220]

Thanks for the great video! It seems the gains for either exhaust relative to stock are so small that you'd likely not notice a performance difference. The sound however, is another matter.

[@TheLemonFactor]

Exactly! We’ll see if the midpipe adds any noticeable hp gains without making it too loud.

[@joesmothers2634]

Interesting data! I guess I’m not very surprised considering how the baffle tapers down and would really make the flow turbulent as the airflow can get behind it. I purchased the same exhaust a few weeks ago for my 2020 RF. Love it! And yes, a little low frequency tone in the cabin at low rpm, but it’s not bad. Awesome sounds when on the pedal though. Thanks for the great video/data!

[@TheLemonFactor]

Thank you for the support and positive comment 👍. I think it sounds really good with the baffle, just wish it sounded the same without it 😕

[@dawnpoint]

The performance loss shouldn’t occur with the twin-tip version right?

[@cyrusnanavati]

Thanks Chad - excellent work my friend - love the methodical way you gop about your business! Are you also planning to add the Goodwin racing Header at some stage?

[@TheLemonFactor]

Cyrus, thank you for the continued support 👍. I am considering testing a couple headers - any preferences?

[@cyrusnanavati]

@@TheLemonFactor Hi Chad - I have got the GWR Shorty Header (ceramic finish) - its a 4-2-1 header which is supposed to be better for mid range torque (which is what I prefer over outright top end Power). I also wanted to keep the whole system with one supplier (Goodwin) so I went with their "Complete" system ie the header, mid pipe and their Super Q (header version) - I am really happy with the syystem both in terms of sound (quite mellow and not as loud as the SSST) as well as performance. The header gets rid of the front CAT and so the only CAT is the free flowing CAT in the mid pipe. Performance is really improved and its such a pleasure to drive. I am playing around with Tunes at the moment. I have a standard Versatuner 93 Fuel stock car tune at present - but in the process of trying out a custom tune to take into account that the car is modified.

[@TheLemonFactor]

Do you plan on having the car dyno?

[@dlg5485]

The SuperStreet is the exhaust I want for my ND3, but I wish they offered a black tip version. Not everyone want shiny bling!

[@Dan-xj9vd]

Thank you Chad for the details of the several test you made. This video and all the other ones. Are you considering adding a tune to your car? I own a 2019 RF Club Sport and I installed a Magnaflow cat-back exhaust last spring. I wasn't sure my choice was right until I watched your video. The Dyno test I did to my car indicated a 178.7 WHP @ 7000 RPM and 158.3 lbs-ft of torque @ 4900 RPM. I also installed a Takeda intake which may help the performance. The airflow test I did with the Takeda indicate a 12.7% flow increase compare to the Mazda OEM Intake box. Unfortunately I did not do Dyno testing of the mods separately so I don't know where I gain most performance.

[@TheLemonFactor]

Thank you, Dan for your support and for taking the time to provide some positive feedback - it’s very much appreciated 😁👍. Yes, actually I already have the new ND2 tune from Versatuner that I plan on installing and testing once the testing of the Goodwin Racing exhaust is complete.

[@Dan-xj9vd]

@@TheLemonFactor I heard about Versatuner ND2 solution and the custom from Fab9. I will wait to see your results and opinion before trying it on my car. I am not too much convinced about the performance gain vs the investment.

[@TheLemonFactor]

It will be interesting to see gains it actually does produce. Stay tuned 😁👍

[@Polyrytmi]

Hey I JUST put my baffle back on today! I guess I take it off again =) I can't wait for the midpipe review!! I really hope it gives some hp gains or better throttle response as they said it would! GOOD JOB

[@TheLemonFactor]

Me too. I’m hoping to install the midpipe this weekend 👍

[@Polyrytmi]

@@TheLemonFactor Nice man

[@gregblack3860]

Thanks as always . Has anyone seen what a header and full exhaust +a tune is worth in horsepower on the nd2?.

[@TheLemonFactor]

I’ll be testing out the new VersaTuner soon. 😁

[@gregblack3860]

Great , when I bought my 2019 new I was planning to put a edlebrock supercharger on it but it looks like there not going to make one . I love turbos as we have a cx9 and a accord with turbos . I’m just afraid of the tuning that goes with adding one to a na car .looks like even the folks that put the edlebrock supercharger on the nd1 have a fair share of tune promblems . I do not have the skills to tune a turbo nd2.

[@Dreihme]

What were the weather and/or altitude differences vs your baseline pulls? Also, were you on seasonal fuel (e.g. Reid vapor pressure differences)?

[@TheLemonFactor]

Same dyno, dyno operator, and setup settings. The dyno results will adjust to climate differences. However, to answer your question it was low 30 degrees F for this run, and the comparison, stock run was done in February, so colder, dryer temperatures as well.

[@richard-mai]

Since the exhaust takes up less space underneath, is the underside aerodynamically affected? Does it create any stability issues at higher speeds? I watched a video of someone installing a Verus rear diffuser and claims it helps with the above issues due to smaller exhausts

[@TheLemonFactor]

I have not noticed any instability issues at any speed. I’m sure a rear diffuser helps in smoothing out the air flow, but to an extent that is noticeable at legal speeds is questionable. 🤷‍♂️

[@shiftintohigh5564]

ND.1 here. I have the Goodwin twin tip SS, Baffle installed, defiantly faster than stock. Mid range rpms is excellent. Rolling punch throws you back into the seat. I will remove it and see if its faster than the installed. Before, when installed, I couldn’t tell much difference speed wise with the baffle, just sound wise like the higher pitch.

[@TheLemonFactor]

Is there a baffle for each pipe on the twin tip version?

[@shiftintohigh5564]

@@TheLemonFactor No, just one baffle. 3 positions moving it in or out. Kinda got the impression the Mazda liked a little back pressure, I liked the higher pitch, so its all the way in. IMHO, it makes it like the single outlet exhaust, but with the look of the twin. You cant beat the quality of the Good-Win. Nice shiny metal.

[@TheLemonFactor]

👍

[@Post_Leako]

I can't wait to see how this stacks up with the midpipe. Goodwin's stuff seems promising, but it always kind of bothered me that, based on my research, their midpipe is heavier than stock. Maybe it can redeem those weight gains with some dyno gains though. I dunno if this is in the cards, but I'd love to see an in-depth review on the Racing Beat Sport/Race Muffler as well since it's the other big one I'm considering. Keep up the great work!

[@TheLemonFactor]

They’re midpipe is definitely heavier - I’m hoping for some modest gains across the power band too 👍

[@evoviiiyou831]

I want an MD3 and simple intake and exhaust mod so bad. Soon very soon I feel it

[@tludwig400]

Great video as usual and thanks for the info. Power gains with the baffle removed seem moot as the sound is not good.

[@TheLemonFactor]

Thank you, tludwig400! Yes, while it sounds good with the baffle, it’s less appealing to me without the baffle. We’ll see what the addition of the midpipe does to the sound (besides making it louder) and performance 🤷‍♂️

[@Daniel-rw2gy]

Very interesting, I hadn’t heard anyone note that there was power loss from the baffle though I always thought that there could be.. this is hugely informative although I don’t have this exhaust it’s certainly one I‘ve been interested in

[@TheLemonFactor]

Thank you for the watch and comment. I’m glad you found it informative 😁👍

[@bradchastain6034]

Hey Chad, great video. Why did you go with the single tip, just curious. Any chance on reviewing the twin tip version of this?

[@TheLemonFactor]

I went with the GWR single tip as I had the Greddy Supreme SP which is a dual tip and wanted to see what look I’d prefer. It’s possible that I’d look into testing one as I’m also looking into a few others. Thank you for the compliment and watch - very much appreciated 😁

[@bradchastain6034]

Thanks for the reply. I recently purchased the twin tip and I must say I'm in love. This exhaust should have came as standard equipment. It's loud when you want it to be, otherwise one would think it's stock. Looks great too. Only downside I've found is that there is some drone while cruising above 80

[@TheLemonFactor]

👍

[@bradchastain6034]

Thanks. OMG, had my first oil change today at Mazda. Actually stayed in their "make shift tunnel" or greeting area until someone fired it up. Amazing, even at warm start! Think I'm in love

[@TheLemonFactor]

😁

[@MrMlyarber]

Is or was a sound DB difference without the baffle. Thanks!

[@nikolaizinoviev7348]

Thanks for testing this 👍

[@TheLemonFactor]

My pleasure. Thank you for the watch and comment 😁👍

[@vinayakjoshi143]

Hi chad... I have a Honda Accord 2020. I need to fix the front parking censor of my Honda Accord. In order to fix it at home, I need to open the bumper. Can u help me with this and what kind of tools we need to fix it ?

[@Daniel-rw2gy]

Fyi seems like you might’ve incorrectly referred to this as the gwr race which is actually a different muffler.. in fact I wonder if the race version would have a bit more power since it has the most straight piped design

[@2023roadstervet]

THANK You for these videos I own a 2016 Club edition.. and I really wanna see you test the Goodwin Race exhaust as well.

[@TheLemonFactor]

Thank you for the watch! Do you plan on getting a Goodwin Racing exhaust?

[@shiftintohigh5564]

Same here 16 Club, You wont be disappointed with Good-Win exhaust.

[@iKRPictures]

Sweeet! I've been waiting for this!

[@TheLemonFactor]

😁

[@Rambiker2023chief]

Any experience with the center exhaust from open flash ?

[@TheLemonFactor]

Unfortunately, no.

[@johnm5131]

just curious, did you swap the mufflers after each series of runs? To be even remotely scientific, you'd need to do that. If you test them weeks or months apart, there will be a significant delta due to at least a dozen variables. The software can help with some, but it is still an extrapolation.

[@chrissikora3359]

Any reviews of the race single on a nc

[@mr_monkey818]

Nice video

[@TheLemonFactor]

Thanks you 😁

[@A_guan]

When will you be installing the midpipe?

[@TheLemonFactor]

Actually, I just installed the midpipe this past weekend. However there’s a couple other videos in que before it - it will be released soon 👍

[@A_guan]

@@TheLemonFactor can't wait to hear it!

[@TheLemonFactor]

👍

[@hbtan9841]

Er.. That's probably not a statistically significant gain.. Nothing that would have a tangible impact anyway.

[@TheLemonFactor]

I wasn’t able to tell a difference in power 🤷‍♂️

[@petermartin9494]

I am getting an ND2 and I will make a point of keeping it bone stock. It will be well maintained but also bone stock. One day down the line it will be worth a lot more than a car that has been messed with and modded in silly ways.

[@TylerWolstie]

It’s an axle back. It shouldn’t gain power.

[@Daniel-rw2gy]

It removes the turns and muffler restrictions from the stock exhaust so it increases power a bit