Putting up a new 3.5 inch exhaust. Does mufflex just sell the pipe without the muffler or do I have to buy the crappy spintech with it? And do they make a ultra flow with a 3.5 in with dual outlets?
Thanks

 

yes they do make a 3.5" in/out

http://www.jegs.com/p/Dynomax/744869/10002/-1

they are on that page.

i had a 3" in/out ultra flow, and imo it sounded like crap, no sound, just noise, so i switched to a spintech pro shootout that sounds amazing. food for thought

 

I would use the Bullet instead of the UltraFlow. I have it and it sounds awesome. Unless you are wanting to stick with a dual outlet.

http://www.jegs.com/p/Dynomax/749870/10002/-1

 

The Dynomax Bullet is an Ultraflo, but from Dynomax. I have the bullet on my car and DAMN does it sound good.

 

I have the straight thru 3.5 ultra flow on mine...Also added a bullet muffler in the intermediate pipe...sounds awesome....alot better than the spintech it had on there...

 

i got a single 4inch with the ultraflo round 6" case and its loud as hell. Very mean sounding car, and very different. has a unique sound to it at the part throttle and everyone i know so far loves it. WOT is screams!!

 

I also have a 4" mufflex with a Ultraflo and I love the way it sounds too. I used to have a spintech, but after doing a search about mufflers on this forum I noticed that people were not happy with the spintech. Meaning the crossflow design was not as effient as the Ultraflo. So I bought one and picked up almost 7 mph in the 1/4 after adding alot of fuel at WOT. Needless to say, if you want your car to sound good rather than run good by all means rev away. IMO I much rather have my combo run at it's optimal performances. Just do a search.

 

So you had the spintech crossflow muffler? the 4 inch in, dual 3 " out like the stock style? That was my only other option other than true duals for my car as its pretty loud as it sits and i wouldnt mind going a little quieter. I had a cop tell me to tone it down alittle but now he doesnt seem to mind but if i could keep it quieter i would have and that spintech would have been my last option.

Good to hear that it doesnt flow very well as i didnt think it would. I"ll keep my ultraflo for now

 

i would have to agree with you guys that the ultraflow flows better, without a doubt, i just could NOT stand how it sounded, you say adding a bullet sounds good before the ultraflow? do you have a sound clip? i still have the ultraflow, and got the spintech for free, so i swapped it, and it sounded better so i left it. if adding the bullet makes it sound that much better i'll gladly buy one, fire up the sawzall and welder, and switch back

 

you have the ultraflo round mufflers? the round circle case, not the oval or box cases?

 

no not the round one, this one:

Race Magnum Welded Muffler
In/Out: 3''
Body Length: 14''

shaped like a flocrapper, straight through 3" in/out

 

oh i see. I have the round case version so there is less packing material in there. I like the tone. Full out racecar at WOT and has a unique tone at part throttle. It may be due to my cam specs and such but its cool sounding. Different to say the least.

the XR1 borla clone i had (split flow from i think dynatech or somethign like that) sounded just wicked at WOT with it dumped over axle but was too loud everywhere else

 

well maybe ill paly with it, doing your own work is cheap right? but yeah, the ultraflow was just white noise, with no cam/throb, just noise, from idle to WOT

 

I have a Borla XR1 Sportsman, anyone use one of these? Know what it might sound like? Was told it would be quieter then my Bullet.

 

with the spintech on mine it had an annouying cackle at lower rpm. it sounded great at wot....at the bullet acted like a resonator and toned it down a little...its still loud, but its 3.5 inch exhaust. its queiter than the spintech. I dont have any way to post a sound clip sry... by the way, I still have the spintech if any one wants it....lol

 

the borla XR1 does have more packing than a bullet and should be quieter than a bullet but its gonna be loud either way the middle divider that goes thru the middle helps quiet things down tho

 

Dosen't anyone consider the cfm rating of a muffler? Sound is one thing ( and I'm not impressed with my Flowmaster either in sound or in flow capability ) but if it creates backpressure then what good is it?
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[QUOTE=zz17iroc;3881948] So I bought one and picked up almost 7 mph in the 1/4 after adding alot of fuel at WOT. QUOTE]

A perfect example of a muffler limiting performance.

 

[quote=skinny z;3882494]Dosen't anyone consider the cfm rating of a muffler? Sound is one thing ( and I'm not impressed with my Flowmaster either in sound or in flow capability ) but if it creates backpressure then what good is it?
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yes i think we all consider it, being that we have all tried an ultraflow, one of the best flowing mufflers out there, but on a car i i drive every day, i like it to sound nice as well. also if you look at previous posts, i said i'd like to switch bac kto a better flowing muffler, provided i liked how it sounds, now when my car becomes a full out race car, yes performance will be the #1 priority (should be soon, just got a truck to drive every day!)

 

i had headers into 2 bullets immediately and 2 turn downs, loved it.

i took a ford ranger 4 cyl, and put a flowmaster on it no muffler, stock muffler and an import tuner muffler. however i put the bullet on there, 3 inch in/out and it sounded so good. all the other mufflers sounded like crap... flowmaster would be next for good sound. i like the deep tone the v8 mufflers give 4 cylinders. put a flowmaster 40 on a prelude, sounds awesome.

and bullets are so cheap, and don't blow out because there's no fiberglass.

 

I didn't see on jegs website a ultra flow with a 3.5 in and dual outs. Does mufflex just sell the pipe without there crappy spintech?

 

ah my bad, i thought you were looking for a 3.5" single in single out. sorry

 

no mufflex does not sell the kit without the muffler

 

But do they make a 3.5 in with dual outlets for the ultra flow?

 

zz17iroc did you gain 7 mph in the 1/4 when you switched from the spintech to the ultra flow?

 

i just looked again, i cannot find it. i thought you were looking for a 3.5" single in, single out, which they do make, and the single in/out have the best flow numbers afaik

 

http://www.jegs.com/i/Dynomax/289/17517/10002/-1

I am thinking of going with this along with a 3.5 inch pipe. Will this muffler have any issues with fitment since its a center in instead of an offset in?
Anyone know what this muffler flows?

 

where are you gonna mount it?

it probly wont fit well in the I pipe area, but it could be possible. I ran a 4.5 x 7.5 oval in the I pipe. 4inch in 4inch out. Fit ok but leaves much to be desired for clearance

my current 6" round ultraflo is in that same spot and fits better side to side but ground clearance is lacking since its taller up and down wise.

 

I was going to put it where my edelbrock muffler is. Right in the back. It should fit right?

 

Yup. Check out this thread I posted on the Drag forum.
https://www.thirdgen.org/forums/orga...ight=ultra+flo

 

Anyone know if dyno max 17517 would fit under my car?

 

Anyone?

 

it will fit...thats the number I have on my car....I have the mufflex 3.5 system with single outlet tailpipe...Had to add a small section of pipe between the muffler and the tailpipe since it was shorter than my old spintech...works perfectly.

 

Hows does it sound with that muffler on, and how much 3.5 pipe did you have to use. I just got a hold of Dynomax and they said 17517 flows 2200cfm. I think that would be enough for me!

 

I think it sounds awesome....Its still a little loud, but aggressive deep tone. The took the pipe from the section I cut out when I added a bullet muffler in the intermediate pipe...It was less than a foot....If I can find my digital camera Ill take some pics...

 

That would be great

 

would there be any negative affect by having a muffler that flows 2200 cfm, when I am only going to make 480 -500 horse max?

 

nope not really. exhaust is about flow and pressure wave tuning and thats done by length of system and pipe size for flow roughly. Too much flow shouldnt hurt even tho you hear you need backpressure.

the bends and walls of the pipe create enough pressure i think

 

Zero back pressure is the goal. In fact with pressure wave tuning we're trying to achieve LESS than zero pressure at the exhaust port to increase scavenging and aid intake flow.

 

Will the ultraflo 17517 the 3.5 inch straight through welded muffler make a lot more noise than my 3 inch edelbrock rpm series catback. I don't want it to be to loud on the street to the point I can't hear my radio, anyone know who loud them ultraflo's are

 

I just replace muffler.From 50 series Flowmaster #430512 to Dynomax ultraflow #17227.Dynomax is much quieter at idle and ~2000rpm than Flowmaster was.Sound is somehow "hollow" at Dynomax.

 

anybody else have any thoughts on the noise of the ultra flo

 

I have a 3.5 ultra oval and a 3.5 bullet in the intermediate pipe. Its is still load, but not too bad. I dont think you will every make it quiet with a performace muffler that size. I had a spintech which was annoying loud. The ultraflow is not too bad and is very deep toned. Im 40 so I dont like loud exhaust, so its ok with me....