im getting a si/do system next week but i still dont know what muffler to go with. i want something so you can hear me coming 2 blocks away with a deep aggressive sound, so far i looked into flow-master 40 series. any opinions. tips, suggestions, and advice is helpful.

 

i have si/do flowmaster 40 series and i love it. it sounds great but isnt too loud. i dont know that you would be able to hear it 2 blocks away unless you get hi-flows

 

flowmaster 10 series

 

^^^ super 10 series

 

remove rear cats and a dynomax bullet out the back

 

It's not going to roar with the stock 4 cats in place. You will get a little sound/rumble with your SI/DO setup, but you will most likely be disappointed with any muffler you choose. The four cats just rob too much sound potential. You should be able to delete your rear cats without a check engine light, because if I am not mistaken, there are no o2 sensors after your rear cats on your 2004.

Also, If you really want to hear it a couple blocks away, then start thinking true duals, rather than SI/DO. You will get more sound with a true dual setup.

 

People can hear my 14" magnapack from 2 blocks away.

And if I recall correctly, the bigger the tips the deeper the sound. but usually anything above 4" looks goofy. I have 4x18's.
Theres a vid in my sig if you are interested

 

another vote for the super 10.

 

I got the same setup but only single exit.....

I just reworked the som bee-otch today and god its loud...


Also,I agree with what migdaddy had to say.

Those bullets sound mean.

Very unique over the magnapack in my opinion.

 

this might be a dumb question but is there a difference in sound if my tips run straight out the back or out the sides behind the tires? and what do u think look nicer?

 

i would get true duals but there a bit too pricey for me lol. if i delete the 2 rear cats with the si/do system will i still have that deep rumble?

 

the super 10 is new news for me, but i just looked at a few video clips on youtube and it sounds pretty mean. im defiantly going to consider it. if anyone has any opinions on the super 10 please post them.

 

I like out the sides at a 45 degree angle behind the rear tires. The sound echoes off of walls, cars, people, etc.

Deleting the 2 rear cats with a SIDO system will still be a great exhaust. I would go dynomax bullet over the super 10, but then again I havent heard a super 10 on an F150 with the 2 rear cats deleted...

 

i say go with dual super 10's 45 em out the back with 4x18 tips itll sound mean with the rear two cats deleted prob hear it farther than two blocks away

 

i have a super 10 si/do on my truck without the cats deleted and 4in x 18in tips coming out at a 45 and i love the way it sounds.. i dunno about hearing it 2 blocks away unless im getting on it a bit but otherwise its got a nice deep rumble. i would imagine if you delete the rear cats it would be plenty loud