Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Magnaflow.......the name says it all!

I'll second that. Having fitted and put 500 miles on car with Stage 1 kit, can confirm that fan comes on just as often, as I would expect.

Thanks everyone for your response!

I quickly posted this late last evening and was a little tired to say the least. Today I thought of a few more details and would like to respond to some of your comments.

My first goal with the new mufflers was not to alter the M3W in any way. I also planned (already done) to store the original exhaust system so they could always be put back on to make it all original. The originals were simply taken off at the clamp and the new ones clamped almost at the same area. The cats were left in. So again, if ever needed everything can be put back to original specs.

When I finally decided on these Magnaflow mufflers, I had spent a considerable amount of time measuring and remeasuring to make sure they would fit on the existing brackets and fit inside the original heat shields. The Magnaflow mufflers at 14" in the large diameter area just fit inside the support brackets. So I made cardboard patterns (front & back) of the support brackets to precisely fit the inlet and outlet on mufflers. This takes a lot of time and like Grockle mentioned in his excellent blog on fitting his Stage I system to "mock up" making sure everything is in perfect alignment. This is so important on an exhaust system especially on a high torquing M3W.

I thought of maybe high polishing or even bead blasting the big Magnaflow mufflers, but decided to just polish the welded areas and leave well enough alone. This took plenty of time as is, but I think they look nice this way under the heat shields.

Early this cool morning, I just couldn't help myself and decided to take the M3W for a little cruise to Sugarcreek and get some gas. The deep valleys were really chilly at around 40 degrees, but I really enjoyed the 12 mile trip. The M3W sounded so nice with that smooth deep tone Magnaflow is famous for. The M3W ran perfectly too - something I was concerned about with the new straight through exhaust system.

So to quote greenteagod..."i wonder how many buzzards worth of power you'll pick up with them?" What a great line....i feel its really now quick on its feet and plenty of power. I think there is some gain even if it's all in my head! Grockle told me today it will only get better too!

Does it run cooler. Yes indeed!!

Grockle also asked me if I was happy with the results. I told him I'm thrilled! There is always a risk when doing any modification. Things you overlooked or something expectantly comes up. Murphy's Law. This time everything worked out...worked out very well indeed!

Right now, I don't plan on making any of these on commission. I would be glad to help anyone as they really need to be precisely custom fitted.

I was thinking if Magnaflow offered these in 3-3.5" diameter it would be just perfect for the M3W. At that size a guy could fit them in his sleep...lol. I may contact them after more testing.

Well here is my first video if it loads correctly. More to follow and a special thanks to Grockle and each of you!


High Noon Speed Shop


https://youtu.be/mBGaXEF5_CM

I like the stock sound better. Guess that's why they make chocolate and vanilla!

More better follow, I was waiting for you to at least blip the throttle. Those sound great, kinda like a mellow Spitfire. It definitely makes the stock one sound a little light in the loafers, considering it's got a honkin' 2 liter V twin sitting out front. Sounds more like the AR stage one as noted here



I imagine even closer though given the likely mic difference and you're idling a bit higher in this clip.

Oh, just a word to the wise on doing the youtube videos. They seem to have not figured out that the world has switched over to HTTPS now, and they don't like the youtube short links here. But if you take the s out of the https and use the full youtube link you can inline them as such.



But I'll digress on my nerdy ramble. Either way, sounds great and what a fun and relatively inexpensive mod.

Ah, that explains all the questions and measuring.. Well done HN. I have seen those Magnaflow mufflers in the UK @ £75. Excellent project.

Regarding the Stage 1 comparison video. Budding audio scientists needn't get in a tizzy about it. The level limitations are explained in the text accompanying the video.

Hi High Noon,

Excellent job! Nice mellow sound, not harsh and functional benefits as well. A great deal of satisfaction is obtained with carefully thinking something through, making it happen, and seeing the result.

Well done!

Hi Noon, what some are not realizing is that the Magnaflow doesn't restrict the exhaust flow as with the stock, I took out all baffles in my stock pipes and yes the car runs cooler and feels snappier, BUT the exhaust note is sharper. Really a great sound from the Magnaflow. Who do I make out the check to?

Thanks Sportser & hbatts,

Your right the Magnaflow are a straight through design and have their proven performance sound. I'm currently working on some actual driving videos right now and just love the Magnaflow exhaust tone. They are not overly loud or obnoxious in any way and I can't imagine any hot rodder not liking these. Stay tuned!

High Noon Speed Shop

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Are your end pipes stock? Mine (2016) are slash cut.

Ken,

These are replacement tubes on the end. Remember (see above) I started with two 48" stainless steel high polished tubes. I cut 25" off and had them bent for the front. That left 23" for the rear pipe and it goes into the Magnaflow a couple inches. I really like the shorter & square cut (sportier) look now. You could cut these at an angle or add an aftermarket tip too, there are some nice options out there.

Another thing I was really considering was to come out of the muffler and have it bent to follow the M3W body line. It would be a longer tube and have the original angle cut on the end.I feel this option would really look sharp on the high end M3W out there! I have already told Grockle about my idea and Morgan should really consider this as an option!!!

You mentioned above that you liked " the stock sound better" and the reason I wanted to make this change wasn't really about the sound. It was my concern of the engine heat and better breathing for improved performance. I had my friend Doug who is our lead mechanic here at High Noon Speed Shop look into the end of the factory pipe yesterday and he said Wow.... that can't be good! If you ever look into one you will make the change! I'm not criticizing Morngan with this as they are under the gun trying to comply with all the insane regulations around the world.

I do like the low tone Magnaflows ........ these little hot rods deserve it!

High Noon Speed Shop