Flowmaster FX series

[Shark875]

Brand new 2021 5.7 hemi. 30 miles, installed a cold air intake and Flowmaster FX series muffler and man does it sound great! noticed a significant increase in power and a more snapper throttle. 3.92 gears what a great choice love it!

 

[Mb7640]

Thats great I'm getting flowmaster outlaw installed tommarow on my 2021 5.7l. What cai did you go with?

 

[MikeyHo808]

Brand new 2021 5.7 hemi. 30 miles, installed a cold air intake and Flowmaster FX series muffler and man does it sound great! noticed a significant increase in power and a more snapper throttle. 3.92 gears what a great choice love it!

Awesome! My D-Fit Flow-X has been sitting in my tool room for the last 2 months waiting to be installed. Looking to complete the job this coming weekend. Still considering CAI Systems. Which one did you go with?

 

[MurphBigHorn]

I’ll be installing my fx tomorrow! Can’t wait to hear it.

 

[Caballonegro]

I went straight pipe and absolutely love it! From B2fabrications! But it might be to loud for some of people!

 

[Whoa_Ram]

Yeah I noticed a muffler change made a difference in throttle response on my truck too.

 

[Shark875]

Thats great I'm getting flowmaster outlaw installed tommarow on my 2021 5.7l. What cai did you go with?

I installed the Flowmaster FX series

Part# 717847 Direct-fit Muffler 409S. Easy install took about 20 minutes with one cut. Sounds amazing! you will love it. Just remember you need to re-tourque the hardware after a couple weeks. enjoy​

 

[Mb7640]

I installed the Flowmaster FX series

Part# 717847 Direct-fit Muffler 409S. Easy install took about 20 minutes with one cut. Sounds amazing! you will love it. Just remember you need to re-tourque the hardware after a couple weeks. enjoy​

I went with the outlaw direct fit. Which sounds amazing even with the resonators still installed. I was wondering what cold air intake you used. I'm not sure if I will put one on or not. Wanted to see what everyone is going with.

 

[MurphBigHorn]

Just installed the fx muffler. Pros. Sounds so good. Cold start was same compared to the stock. But normal idle sounds awesome. Went for a quick run sounds just as I wanted. Cons. Had to leave and make a run for a hardware store. Nothing was provided except the clamp. And no instructions. So I had to google for the cut location.

 

[mikeru82]

I went with the outlaw direct fit. Which sounds amazing even with the resonators still installed. I was wondering what cold air intake you used. I'm not sure if I will put one on or not. Wanted to see what everyone is going with.

That's a 4th gen muffler and won't work for us 5th gen owners. Now that I look at your avatar pic I see a 4th gen is what you own (Warlock).

 

[mikeru82]

Brand new 2021 5.7 hemi. 30 miles, installed a cold air intake and Flowmaster FX series muffler and man does it sound great! noticed a significant increase in power and a more snapper throttle. 3.92 gears what a great choice love it!

Glad you found something you like. I'm still trying to decide what I want for my truck.

 

[Shark875]

I went with the outlaw direct fit. Which sounds amazing even with the resonators still installed. I was wondering what cold air intake you used. I'm not sure if I will put one on or not. Wanted to see what everyone is going with.

I installed the spectre cold air intake system. I did some research as I was in between the spectre and the K&N, comparable, glad I made the choice as the spectre sounds mean! saved a couple $$ also

 

[Shark875]

I installed the spectre cold air intake system. I did some research as I was in between the spectre and the K&N, comparable, glad I made the choice as the spectre sounds mean! saved a couple $$ also

 

[cablejack]

Don´t you need a CAI and tuner to change muffler?

 

[grimreefer]

Don´t you need a CAI and tuner to change muffler?

Negative.

 

[cablejack]

Negative.

Good, but why?

 

[grimreefer]

Good, but why?

Mufflers are positioned after the catalytic converters and are clear from any sensors or meters and don't affect the aspiration of the engine.

 

[Whoa_Ram]

Mufflers are positioned after the catalytic converters and are clear from any sensors or meters and don't affect the aspiration of the engine.

Correct and with a CAI you can get it tuned to get best performance, but not required as the computer will compensate fuel to a certain degree. If you are going for max HP/TQ or want all the power you can out of a CAI then yes a tune would be best.

 

[Mountain Whiskey]

Good, but why?

Well, because it is just a muffler. It just muffles sound like the name implies.

 

[ferraiolo1]

Good, but why?

Because a catback and / or intake does nothing for performance to a stock engine.

It’s for sound and looks


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