not to sound too naive, but what does the series number represent on the flowmaster mufflers? i.e. = the lower the number, the less restrictive?

i've done a search and had no success finding anything helpful.

i'm trying to find the least restrictive flowmaster and i'm not sure which to go with.

please help

 

To my knowledge, the numbers dont nesscarily mean anything as far as function...I do, however, believe that each series muffler sounds different/louder/quieter and that is why there are so many to choose from.

Another thing is that from what i hear, Flowmaster are some of the most restrictive mufflers out there. Now im sure people will chime in and either disagree or agree...but the overwhelming majority of posts ive read on these forums seem to back up that flowmasters dont flow very well.

If you are looking for the best flowing muffler, you might want to look into dynomax ultra flos.

EDIT: Also, if your set on getting flowmaster, i doubt there is much flow difference between the various series mufflers.

 

i was thinking either flowmasters, or the SLP kit

 

everyone seems to go with the 80 series for our cars. is that the only flowmaster that works without doing serious mods for true duals, or is it because its the best application (from flowmaster)?

 

usually the lower the series, the louder it is

the 80 series is still pretty loud, i had one on mine for a while untill i switched to true duals with 40 series muffs..they are much louder.. hehe


The original flowmasters don't flow the greatest, but still alot better than any stock muffler. the Deltaflows smoothed out the flow through the chamber and helped that out alot.. the super40's sound and flow great!

 

Well i dont know too much about exhaust yet, but i have a catalog from flowmaster and the 80 series were specifically designed for camaros and firebirds because we have mufflers that are mounted parellel to the rear axle, as opposed to most cars where the muffler is perpendicular to the rear axle.

They do make 40 series for our cars, and as far as i know you can use them w/o and modifications. Dont know which is 'best' (40 or 80), but i know they sound slightly different.

 

here is the difference:

80 series idle

40 series idle

 

On Flowmaster mufflers the series number represents how restrictive the muffler is.

 

well, through the advice on this post and the others that ive researched, it seems that unless i want to go true duals (and that seems pretty tricky on thirdgens) my two best choices are =

1. flowmaster 80 series

2. dynomax ultra flows

so has anyone compared the two personally, or have a good idea of how they compare?

 

I've got an LO3 305 TBI, and from what I am hearing apparently Flowmasters aren't really as good as Dynomax....I am having second thoughts about getting a flowmaster 80 now because when compared to the Dynomax Bullet supposedly it kicks the crap out of the flowmaster as far as sound and performance go.

The bullet exhaust is cheaper than the flowmaster 80 about 38 bucks online, I may or may not get it, I need to do more research on it but from what I have found so far, its the best exhaust for the money.

 

Flowmaster 80 on a 305

Works just fine for my application (not much).

 

thanx for the clip, cadilac

 

i looked the bullet up. isnt that bullet designed with true duals in mind though?

 

Yea for a stock application (meaning your just changing the muffler), you shouldnt get bullets--because they wont fit. You should get the dynomax ultra flo welded muffler. I dont know the part # but its like $99 and it will fit in the stock location i believe. You might need to use reducers though. Someone should be able to elaborate on this further...

 

i just wanna say, you guys are a huge help, and thanx for all these tips. everyone seems really cool thus-far.

i have headers on it, but then i have the stock Y-pipe (rotted out) and an old flowmaster.

if i'm gonna change the muffler, i should probably do the whole system (behind the headers), right?

BUT, theres so much conflict about true duals on these particular cars ( clearance issues). so i figured it would best to have a another Y-pipe thrown on it. thats why i was looking for a stock-styled muffler, just a much less restrictive one.

so, all that being said = i think i'll go with the ultra flows,.... UNLESS ANYONE HAS A TRUE DUAL CONCEPT THAT STILL MAINTAINS SOME KIND OF CLEARANCE (i wanna DRIVE my car, not living in fear of speedbumps)

 

Dynomax Ultra Flows will be far and away better on the performance end of things.

 

Here is the dynomax ultra flo you could use in your setup

ultra flo welded: http://store.summitracing.com/defaul...h.asp&N=400358

Now the inlet is 3 inches, so your gonna need to use a reducer of some sort to get it to match to the 2 1/2 or 2 1/4 I-pipe of your stock setup. Someone else will be able to elaborate on that, because i really dont know what comes into play using a reducer to mount a new muffler onto a stock I-pipe.

Ive seen tons of charts and research on what mufflers flow the best and dynomax ultra flos are definately at the top of all studies/research ive seen...much better flowing than flowmasters. I wish dynomax made a catback for my car with a 3" i-pipe because i would be ALL OVER THAT!!

 

$166, not bad at all. thanx

what about getting a shop to make a 3 inch Y-pipe instead of using a reducer? or would that get pretty costly?

 

Ah ****...sorry apparently the link i gave you didnt bring you to a specific part... The muffler i think you want is only $99...summit part # WLK-17227 . I wouldnt buy a full dynomax catback system for our cars because they come with 2.5" I pipes and 3" seems to be a much better fit for our cars.

 

oh, now i see which one you were talking about. thanx again.

so get a shop to make a 3inch y-pipe, place a dynomax ultra flow at the end with some tips, and hopefully my headers will extract a decent sound from my "essentially stock" 350????

what do ya think?

 

anyone?

 

so are you telling me the dynomax bullet muffler WILL NOT fit on my LO3 TBI?

If not, what do I need to do to make it fit, I like the way this thing sounds much more than the flowmaster, but I listened to cadillac's 80 series on his car and if mine will sound like that....I'll just go with the flow for now and when I raise enough money buy an entire dynomax catback system.

 

Alrite guys, im not really an exhaust guru but ill help you out as best i can.

1. You cant use dynomax bullets in your stock setup because they're like a glasspack styled muffler. They're basically just a little tube that has 1 inlet and 1 outlet. You can however use a dynomax ultra flo welded muffler in the stock location i believe. The part # is listed a few posts up. It probably doesnt sound much different...as they're both straight through mufflers.

2. As many people advised me when i wanted a full dynomax catback, i will now advise you. Its probably not wise to go with a dynomax catback for the simple reason they only come with 2.5" Intermediate piping, which isnt really enough for our v8 cars. I really wanted to get the dynomax ultra flo catback but i was advised against it by alot of people because of the 2.5" I pipe. For now im going to be getting the hooker 3" catback..and i mean if i grow to dislike the sound after a year or so i will just swap in the dynomax muffler.

And yea skunk that sounds like a plan. I would imagine it would sound pretty good.

Again im not exhaust expert, i am just restating what people have told me numerous times. Someone will come in and post who is alittle more knowledgable than me and that should clear alot of things up!

 

you can use bullets, but it requires the exhaust shop to fab up some pipes. A few extra bucks for near perfect flow and great sound! Still cheaper than most cat-backs all said and done, flowmaster included.

If you wanted to stick with the stock piping (which doesn't make much sense) then you can pick up any one of a number of mufflers with a single inlet and dual outlets. I'd personally recommend the Hooker Aerochamber and Magnaflow mufflers over Flowmaster anyday. I still recommend buying the whole 3" catback system if you wanted to use a traditional style muffler as opposed to the Bullet style.

 

are you talking about the 3inch catback from hooker?

where can i get the kit to make mine sound like EvilCartman's car? (it should be mandatory that everyone who joins must first listen to his sound clip)