2 Quick Questions

JRubin2000 · September 3rd, 2006, 06:11 PM

hey guys, i just got my hand on two flowmaster mufflers, 40 series, that i want to put on my gt. 2 questions, i live in NY and need to pass emmisions, will the mufflers affect it in any way, and 2, will it violate my ford warrenty?

Drgnracin72 · September 3rd, 2006, 06:22 PM

no and no

JRubin2000 · September 3rd, 2006, 06:54 PM

alright, thanks, i shoulder be putting them n this week, we were originally gonna throw them on a beat up 87 irocz camaro, that my friend bought for about 400 bucks. thanks again

mdvaldosta · September 3rd, 2006, 07:07 PM

You'll love the sound of Flowmasters, although it'd be much louder with an aftermarket mid-pipe (with high flow cats to pass emissions).

JRubin2000 · September 3rd, 2006, 07:12 PM

yea i cant wait to put them on, ill try and get a sound clipup once theyre on.

WaRHorse · September 3rd, 2006, 09:07 PM

from what i know mustangs have 2 cats per bank how would it affect the car if you didnt put any on? prolly a dumb question but i dont know.

lemon · September 4th, 2006, 11:14 AM

no question is a dumb question. despite what my cpt 172 instructor says...

the cats modify the exhaust air ( to change carbon monoxide to carbon dioxide - i think ). that restricts the air flow. with no cats, the exhaust moves through the tubes faster. but that also kills emissions tests.

WaRHorse · September 4th, 2006, 11:43 AM

I know what they do and everything but i've heard a couple of people say that newer cars need backpressure and removing them will decrease backperessure and make the car run not so well. i allways thought you want the lowest restricion exhaust possible whos right?

lemon · September 4th, 2006, 09:30 PM

im not sure if im correct, so if i am not, please correct me...

the exhaust is supposed to be removed from the engine. it aint supposed to stay in the engine. thats what the 'ex' means - "out". backpressure kills any hopes of a free-flowing exhaust (why offroad pipes are popular, but they do not treat the exhaust as catted pipes do), which robs the engine of some spare horsepower, since it has to use some of the generated horsepower to push against the backpressure to clear the cylinders. with a more free-flowing exhaust, there is no backpressure, allowing the engine to transfer just that much more hp and tq to the powertrain. which is good. but it isnt "emissions legal" ... and all that .. stuff

this is just from a "naturally" aspirated point of view, and it is just my thoughts on the subject, so i could very well be wrong.

raceruler03 · September 5th, 2006, 11:26 PM

depends on if you have to have emissions where you live. Though it is a $10,000 fine if the cops want to be dicks about it.

GTSilver · September 6th, 2006, 01:08 PM

Originally Posted by WaRHorse

I know what they do and everything but i've heard a couple of people say that newer cars need backpressure and removing them will decrease backperessure and make the car run not so well. i allways thought you want the lowest restricion exhaust possible whos right?

allowing for more flow increases horsepower but decreases a little bit of torque. you might notice a liiiiitle change in your take off with the out cats but u'll get allllll that lost torque back when ur RPMs getta little higher...in other words...with a "free flowing" exauhst you'll get good high end results on the track but u might get a little lag on ur take off...not a whole lot...so dont be discouraged if you got completely off-road...a stock stang comes with 4 cats...take those for off for a pair of hi-flos and i'll think you'll be happy! (of course with anything, i could be completely wrong and sound like a jack ass) check it out for yourself.

JRubin2000 · September 6th, 2006, 05:57 PM

Hey guys, i just got my alarm installed at ford and had the flowmaster 40 series mufflers installed at a local shop. It sounds amazing!!! Has a nice rumble to it. Besides having a slight rattle on the right muffler, it only happens oncein a while, everything seems so be in order.

mustangstud13 · September 6th, 2006, 11:38 PM

No they wont affect your warranty and it wont hurt emissions either. Only worry about emissions if you play around with your catalitic converters.

September 3rd, 2006, 06:11 PM	#1
JRubin2000 Regular Join Date: Sep 2006 Location: Staten Island, New York Posts: 203 iTrader: 0 reviews	2 Quick Questions hey guys, i just got my hand on two flowmaster mufflers, 40 series, that i want to put on my gt. 2 questions, i live in NY and need to pass emmisions, will the mufflers affect it in any way, and 2, will it violate my ford warrenty?

September 3rd, 2006, 06:22 PM	#2
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,635 iTrader: 2 reviews	no and no __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

September 3rd, 2006, 06:54 PM	#3
JRubin2000 Regular Join Date: Sep 2006 Location: Staten Island, New York Posts: 203 iTrader: 0 reviews	alright, thanks, i shoulder be putting them n this week, we were originally gonna throw them on a beat up 87 irocz camaro, that my friend bought for about 400 bucks. thanks again __________________ Check out my band Wrong End Of The Gun at www.myspace.com/wrongendofthegun

September 3rd, 2006, 07:12 PM	#5
JRubin2000 Regular Join Date: Sep 2006 Location: Staten Island, New York Posts: 203 iTrader: 0 reviews	yea i cant wait to put them on, ill try and get a sound clipup once theyre on. __________________ Check out my band Wrong End Of The Gun at www.myspace.com/wrongendofthegun

September 3rd, 2006, 09:07 PM	#6
WaRHorse Newbie Join Date: Sep 2006 Location: Wausau, WI Posts: 36 iTrader: 0 reviews	from what i know mustangs have 2 cats per bank how would it affect the car if you didnt put any on? prolly a dumb question but i dont know. __________________ The only thing worse than a ricer is a wannabe ricer.

September 3rd, 2006, 07:07 PM	#4
mdvaldosta MM Fanatic 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,940 iTrader: 0 reviews	You'll love the sound of Flowmasters, although it'd be much louder with an aftermarket mid-pipe (with high flow cats to pass emissions).

September 4th, 2006, 11:14 AM	#7
lemon Enthusiast 1999 GT Rag Join Date: Aug 2005 Location: Charleston, SC Posts: 697 iTrader: 0 reviews	no question is a dumb question. despite what my cpt 172 instructor says... the cats modify the exhaust air ( to change carbon monoxide to carbon dioxide - i think ). that restricts the air flow. with no cats, the exhaust moves through the tubes faster. but that also kills emissions tests.

September 4th, 2006, 11:43 AM	#8
WaRHorse Newbie Join Date: Sep 2006 Location: Wausau, WI Posts: 36 iTrader: 0 reviews	I know what they do and everything but i've heard a couple of people say that newer cars need backpressure and removing them will decrease backperessure and make the car run not so well. i allways thought you want the lowest restricion exhaust possible whos right?

September 4th, 2006, 09:30 PM	#9
lemon Enthusiast 1999 GT Rag Join Date: Aug 2005 Location: Charleston, SC Posts: 697 iTrader: 0 reviews	im not sure if im correct, so if i am not, please correct me... the exhaust is supposed to be removed from the engine. it aint supposed to stay in the engine. thats what the 'ex' means - "out". backpressure kills any hopes of a free-flowing exhaust (why offroad pipes are popular, but they do not treat the exhaust as catted pipes do), which robs the engine of some spare horsepower, since it has to use some of the generated horsepower to push against the backpressure to clear the cylinders. with a more free-flowing exhaust, there is no backpressure, allowing the engine to transfer just that much more hp and tq to the powertrain. which is good. but it isnt "emissions legal" ... and all that .. stuff this is just from a "naturally" aspirated point of view, and it is just my thoughts on the subject, so i could very well be wrong.

September 5th, 2006, 11:26 PM	#10
raceruler03 Enthusiast 2000 mustang gt Join Date: Aug 2006 Location: georgia Posts: 913 iTrader: 0 reviews	depends on if you have to have emissions where you live. Though it is a $10,000 fine if the cops want to be dicks about it. __________________ http://i157.photobucket.com/albums/t...donecopy-1.jpg

September 6th, 2006, 05:57 PM	#12
JRubin2000 Regular Join Date: Sep 2006 Location: Staten Island, New York Posts: 203 iTrader: 0 reviews	Hey guys, i just got my alarm installed at ford and had the flowmaster 40 series mufflers installed at a local shop. It sounds amazing!!! Has a nice rumble to it. Besides having a slight rattle on the right muffler, it only happens oncein a while, everything seems so be in order.

September 6th, 2006, 11:38 PM	#13
mustangstud13 Regular Join Date: Sep 2006 Location: Acworth, Ga Posts: 164 iTrader: 0 reviews	No they wont affect your warranty and it wont hurt emissions either. Only worry about emissions if you play around with your catalitic converters.

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