1) A flowmaster muffler with no cat sounds like a$$. Tiny, nasty, dump-truck like.

2) A flowmaster muffler with a cat, especially a high flow one, sounds great.



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91 Trans Am WS6
Bright White
5.0 TPI auto
Flowmaster 3" 2 chamber catback
Trans Go shiftkit
2000 stall converter

Built on Wednesday

 

Which version of flowmaster do you have? I have an american thunder system with headers and no cat that sounds great, nice and low not tingy sounding.

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best 1/4 mile so far: 13.4 @ 101mph

84 Camaro 305 ported & milled heads, 3 angle valve job, Edelbrock Performer RPM intake, Hedman full length headers, Accell ignition, Crane 274H cam, B&M 700R-4, 3000 stall speed, 4.10 gear,
M/T ET street tires
visit my website at http://www.geocities.com/jbenge/page1.html

 

I have the flowmaster american thunder with random tech cat and slp headers and hear nothing but compliments on the sound,or people asking "what the hell you got in that thing".I had the forceII on it before,but it just didn't sound right......gotta love the flows.....

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92RS,POLO GREEN

 

I have an 84 z-28 with a 350 with no smog stuff and straight pipe in place of cat with american thunder 3in and sounds awesome

 

It depends what size and power your engine is.

------------------
Looking For:

87 IROC-Z28 350 TPI
The car I want.

84 TRANS AM 305 H.O.
Another car that would be OK to own while I still look for the IROC-Z!!

 

i have a 2 chamber flow with a punched cat and it sounds awesome! I dont know what your talking about, my car sounds kinda like a NASCAR car IMO. Really nice when reved or opened up.

 

all i know is that i have a 89IROC with 9.3 compression, TES headers, straight pipe and american thunder and at WOT....its extremely hard to hear detonation and people can hear me coming from blocks away and love the sound

 

i have a 40 series...it sounds good 90% of the time but gets a little snappy once in a while. i like it though. loud as HELL.

-brian

btw...no cat

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1991 Camaro RS - ultra blue metallic, t-tops
GMPP 350 HO crate engine - TBI, MSD ignition, SLP exhaust
700R4 - 2,400 stall converter, vette servo
10 bolt - SLP zexel torsen differential, GM 3.42s
z28boy.fbody.com
z28boy@twcny.rr.com
AIM - "Z28 Boy"

1998 Pontiac Grand Prix GT - 2 door, black

 

i should have been more specific. I meant a gutted cat, not 'no cat'. A flowmaster setup with a straight pipe could be the meanest sounding of all....

 

I had 2 chamber Flowmaster 30's, true duals no cats, for a while on my Jeep with the 350. Sounded just like Nascar on Fox above 5 grand but droned the heck out of me sooooo bad that I swapped them out for big-body cheapo Thrush's for the Winter salt. Kind of miss them now but can hear the radio and it makes driving by a cop/police station a little less stressful. The compliments on the exhaust note TOTALLY disappeared.

 

Mr. J - I was about to blast you for your ridiculous statements, but then I saw your additional reply about the gutted cat.

I have no cat and the 3" Flowmaster system. It sounds awesome! Great rumble and good tone. Sets off car alarms in my parking ramp at work.

Exhaust noise comes from many factors - much more than the brand of muffler. Engine size and power, duals vs single, pipe size, muffler chambers, cat vs no cat, where the exhaust exits, turndowns, all affect it.

 

5.7 and 5.0 both are going to produce different tones.
I was running a 350 TPI with no cats and 40 series and it sounded great.

 

is it true it takes a flowmaster muffler a while to sound its full potential. I have dual 40 series and in the beginning it sounded gay but i hear a tiny deep rumple after an hour of driving.

------------------
92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

My buddie's 92 Z had the American Thunder series and stock cats and manifolds and sounded great. We're now upgrading the car with SLP 1-3/4" headers, Random Tech cats and AFR heads; Flowmaster should then ROCK!

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• 1997 30th Anniversary SS LT4 #74 with all SLP options and K&N, white gage faces, and Hotchkis shock tower brace - In process: SFC's
• 1996 Corvette Grand Sport LT4 #509 with K&N, Flowmaster exhaust, Hypertech power programmer, and Baer slotted/cross-drilled brakes - In process: SLP throttle body and 1-3/4" headers, AFR heads, 4.10 gears, custom Panasonic/Alpine/Audio Control/ADS audio system
• 2000 Chevy TrailBlazer

 

The guy I sold my 84 TA to gutted the cat. It has a very healthy 350 in it with a flowmaster and it sounds great. I seriously doubt anyone can tell the difference between a car with a straight pipe and a gutted cat. But Mr. J is entitled to his opinion. After all opinions are like, well, you know the rest.

 

I've got my 80 series and I love the sound. I always get complimented on the sound, and I'll ive got is a wussy LG4 305.

 

I've got some sort of 2 chamber flowmaster on my TA, dotn know what series though. It was loud with just that on there, but after i added a random tech cat(i had to put something on for jersey emissions), it still sounded like i had headers. I too, set off car alarms...freinds at school told me they could hear me comming from the main road...yes, it's loud as ***t without any other mods done...i'm very pleased.


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1986 WS6-Equipped 5.0 TPI Trans Am
Random Tech High-Flow Cat
Two Chamber Flowmaster Muffler
Megs Custom 4.5" Stainless Steel Tips
1999 Grand Am GT In-Dash CD Player w/Equalizer(fits like '86 original)
5% Tint On Rear, 35% On Sides

OTHER RIDE:
1998 C5 6Spd. Corvette
Silver w/Gray Leather Int.
12/14 Options
Stock(for now)
Best 1/4th: 13.5 @ 104.4MPH

 

Just like opinions, also what sounds great to one person sounds horrible to another.

I prefer a mellow deep sound that definitely sounds like a V8, but not so loud that I draw attention where ever I drive. I also like to be able to talk to my passengers and listen to the radio occasionally.

 

Glenn,

Whatcha run for mufflers to get your sound??? I like that idea, myself.

 

i run mine with a cat cause we already have enough ships crashing and spilling out millions of gallons of oil in the oceans.from some tests ive heard that gutting your cat or removing it will only add 2hp and youll lose 10-15lb torque.not worth it.

 

I have a FLowmaster 80 series w/o a cat. This is what it sounds like.

http://members.aol.com/j007golden/Exaust1.wav

I don't know, I like the sound of it, but u people can decide.

------------------
Eric Natzke
91 Firebird 305 TBI
"It Ain't Stock"
http://members.aol.com/j007golden/91firebird.html
For info on certain parts or mods go to the site below
http://members.aol.com/j007golden/modeval.html

[This message has been edited by 91Bird305 (edited April 05, 2001).]

 

Abought the cats, I read that a HI-FLOW cat can actually improve performance from no cat. Once agan this also depends on the setup, but for most cars, W headers and performance muflers this will improve like someonw here said abought loosing torque.

 

well thanks for your wonderfull input!! now i have a 3" flowmaster cat-back acually with no cat!! and it is a low rumbly idle and it sounds awesome!! maybe if you'd put a REAL engine in your car and get rid of that pathetic 305 you could have some decent sounding exhaust!!oh yeah dump the lousy tpi setup! they sound like S***



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89 firebird formula

356 10.5:1compression
comp cams xe262 cam
performer rpm intake
#1405 edlebrock 600
sportsman 2 heads 64cc 2.02/1.60 valves 200cc intake runner
msd 6al
h.e.i. proform 50,000 volt vac. advance ditributor
700r-4 with 3.08 first gear and 3.23 posi 7 5/8 rear end.
b trans shift kit(will kill shifts...suck dong!!)
shorty heddman hedders with custom 3" pipe y-pipe back(no damn cat!) with 40 series flowmaster!


future mods: 406 roller REALLY REALLY REALLY RADICAL!!!!!

 

So ya flame the 305 and the TPI setup??

Looks like you just insulted 75% of the members of this board!

------------------
1991 Firebird Formula
305 TPI, Auto, Accel Cap & Rotor, K&N Filter, Grant GT Steering Wheel, 5% Rear tint, Pontiac Windshield Decal, Fresh paint
No real mods yet!

Former owner of an 88 2.8 Firebird....RIP

 

The 305 TPI is hardly pathetic... blazingly fast? hell no. But pathetic? That's reserved for L03s and LG4s.

Burnoutrpm, you're an idiot. Go away.

Troll.

 

Well done FLOWMASTER u guys got my vote(dosent sound as good as my open headers) but when i installed those 40 series 3 inch mufflers into the 71' Duster, what i got was a nice rumble, beautiful, Kutos to FLOWMASTER>

------------------
92' camaro
New 305 block TPI conversion, Flat top pistons,Bore over .30 Forged parts all around,Edelbrock intake,ported plennum,ported corvette alluminum heads, accel cam,52mm throttle bodie, SLP runners Home aid cold air induction, Air foil,ford SVO 19lb injectors,fuel regulator,cloys timing chain, comp alluminum roller rocker arms and pushrods MSD 8.5 mm wires, bosch plattinum plugs, hypertech cap & rotor and coil, Edelbrock TES headers, free flowing catalytic converter and a 3 inch force II flowmaster exhaust system, and a 3 inch cutout,Zoom multi friction clutch, T-5 tranny,billenstien shocks&struts.
Soon to come!!!
Procharger system 12lbs o boost.
New paint job(hawaiin orchid purple)Cast alluminum ZR1 rims w/ 275 tires.
Favorite quote: "where ever u go, there u are"

Other car;
1971 plymouth Duster
Mods:340,edelbrock victor jr. intake, 650 4 barrel holley, heddman headers,40 series dual flowmasters, cold air intake,4:10 gears, just got a new paint job and cragar rims with 315 tires in the back.
:Yeah its not a chevy but damn how many 71' dusters have u seen in the streets.

 

hey...my LO3 isnt pathetic...it may be slow but its not pathetic...i was gonna pass it down to the 6ers...but they will eventually pass it to ricers...so ill just skip them and say my LO3 is slow, but Ricers are pathetic

 

a gutted cat seems go give that hollow tin can sound...no matter what it's on. i used to have a cavalier and some moron gutted the cat on it, people thought i was driving a tin can...that car was so embarassing...anyway the point is, it all depends on what you like...some people like myself dont like the standard flowmaster (ie mustang) sound. my edelbrock sounds kick *** , thats my opinion and everyone has one. btw my brother was driving my car today and i was working in the backyard when i hear this sweet *** sounding car go by, i walked around the front to see what it was and i was pretty suprised that it was MY car...i love when that **** happens

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350, Comp 262, Edelbrock Performer intake 600 cfm carb and exhaust, headers
-JVC, Eclipse, Pioneer, MTX, Phoenix Gold, Planet Audio

 

trigger84 Does this 80 series have a mild sound at idle i don't want something too loud


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91 firebird vert
tan top&interior
305/700r4<br>MY SITE HERE

 

hey now... im getting a 6

lol

what flowmaster / cat should i put on to make it sound nice? i know it will never sound like a V8 so dont flame me on that, just give me some answers maybe, and very little laughs

 

For a 6er or any other engine it's all a matter of personal taste as you can see by all the posts on this board. Your best bet would be to try and listen to some other 6ers with different mufflers on them. It may take a little while to find a bunch of people with 6's that all have different mufflers but it may be worth the extra time. Your only other choice is to take a chance and go with one of the popular mufflers that are out there. No one is going to be able to tell you what sounds good to you. Only you can decide that.

 

Oh yeah, just for the record I have a ZZ4 with SLP headers connected to a Flowmaster ForceII 3" system with the one inlet/outlet muffler and have no complaints except when after revving it and the revs wind down quick, sounds kinda weird as it sucks back but I don't sit there revving my engine all day so no problem. I have heard many sound the same. I also have no cat, not gutted, just not there and it sounds mean. Remember, cars didn't always come with cats and most older cars don't have them so to say that just b/c you don't have one that it sounds crappy doesn't make sense. A hollow one is a diffrent story however when I did have a hollowed cat with my 305TPI I thought it sounded pretty decent too. Then again, this is just another opinion :-)