Flowmaster 40 Series vs. Super 44 (interior resonance)

Lsxtrucker · February 15, 2020

So the 2003 Silverado has stock exhaust. I've had flowmaster in previous vehicles and like the sound. But I'm wondering what you guys think about the Original 40 Series compared to the Super 44. I can barely tell (actually can't tell at all) if my truck is running at idle without seeing the tach move. It's silent, rather sad TBH, this will change on Monday if I can pull the trigger on a muffler. I'm looking for very strong deep sound inside the cab even at idle. Not worried about neighbors as I live in the country. Not worried about drone either as my mullet abides. I'm keeping the cats in place. Any recommendations? Flowmaster says the 44's are louder but every video I see the old school 40s seem to rumble a lot more. Almost every cat back system Flowmaster makes has the Super 40 which is supposed to be quieter than the two I'm comparing.What's your opinion...what are you running?

CamGTP · February 15, 2020

Just hack the muffler off and I bet you'll like that sound. I don't think they sound bad straight piped so long as the cats are there.

The cats will act as your resonators and keep it tame.

Lsxtrucker · February 15, 2020

Thanks but no thanks.

CamGTP · February 15, 2020

Then pick a muffler and slap it on.

We can give you an opinion or a you can watch video's but until you actually install the muffler yourself, you will not know if it is up to your standards for sound.

Lsxtrucker · February 15, 2020

I ran into a small issue as the Flowmaster Original 40 Series isn't available in a 3.00"center in/3.00"offset out like the Super 44 is. After comparing the sound of the two cans I pulled the trigger on the 40 Series anyways. I'm sure that since there will be over a foot of extra working space the offset on the inlet side won't create any issue. I found a nice little mom&pop exhaust shop down the road who will remove the factory can and replace it with the muffler I bought welded in place with my tip provided for $100. Not bad at all. Definitely looking forward to it. Tomorrow my infrared temp gun will be arriving so I can do a test on the cats with that to get a idea what's going on before I have it installed Monday.

I realized the thread isn't exactly interesting *after* I already posted it. It'd be nice if there was a way for me to delete the thread but usually even on dumb threads like this, useful information is written that may help someone else on a similar quest.

Flowmaster states in YouTube videos that the Super 44 is a louder muffler than the original 40 Series (not to be confused with the Super 40). But in their website they contradict this by providing a visual chart that puts the 40 Series above the 44 on the agressive factor. That's because the 40 Series has more interior resonance than the 44... and IMHO sounds meaner.

I bet it's really gonna sound good when I put my speed engineering longtube headers on her oh yeah!

sefiroxx · February 22, 2020

Leave your threads in place.

I'm a management consultant by trade, and over time, with lots of presentations, have learned there are lots of people with the same question, but are afraid to ask. So, it often takes a "seed" to start the discussion. But once started, the questions and information flow - helpful for all.

Lsxtrucker · February 22, 2020

12 hours ago, sefiroxx said:

Leave your threads in place.

I'm a management consultant by trade, and over time, with lots of presentations, have learned there are lots of people with the same question, but are afraid to ask. So, it often takes a "seed" to start the discussion. But once started, the questions and information flow - helpful for all.

Thanks bud I'm slowly learning the same. I actually saw a few threads that someone shot down and the OP asked for it to be removed. You're right. Maybe someone will have that same question or issue down the line. Good looking out.

dodgefan123 · February 10, 2023

On 2/14/2020 at 8:11 PM, Lsxtrucker said:

So the 2003 Silverado has stock exhaust. I've had flowmaster in previous vehicles and like the sound. But I'm wondering what you guys think about the Original 40 Series compared to the Super 44. I can barely tell (actually can't tell at all) if my truck is running at idle without seeing the tach move. It's silent, rather sad TBH, this will change on Monday if I can pull the trigger on a muffler. I'm looking for very strong deep sound inside the cab even at idle. Not worried about neighbors as I live in the country. Not worried about drone either as my mullet abides. I'm keeping the cats in place. Any recommendations? Flowmaster says the 44's are louder but every video I see the old school 40s seem to rumble a lot more. Almost every cat back system Flowmaster makes has the Super 40 which is supposed to be quieter than the two I'm comparing.What's your opinion...what are you running?

Try the flowmaster super 10