How does muffler size affect sound? Thoughts on what size to pick up - 3000GT/Stealth International Message Center

Tqlla · 12-03-2007, 11:07 PM

Hey, I have been doing some late night research on which mufflers to buy for my 3000GT(with 192K miles, and dying VR-4 exhaust)... and I have found that people dont actually say anything about which muffler was purchased, spec or model number wise. IE most people will say... purchased a magnaflow, or a flowmaster(though I have see the 40 series mentioned often)

Anyway, what size should I get? My tubing is 3"

So I am thinking about buying this and putting it where a driveshaft would be, then piping to tips
Magnaflow 3" inlet, dual 2.25 output.
5x8x18

Should I go with single in and single out... then y split?

Any thoughts? how does size affect sound? I want it Quiet as possible.

red_stealth · 12-04-2007, 06:13 AM

I have a Magnaflow (2-1/2 in - 2X 2-1/4 out) it sounds great without being too loud. Flowmaster 40 sounds good, but will be too loud for my taste. I also kept the first resonator - that keeps the sound really smooth, no raspiness of any kind - just V6 music

. I followed the recommendations of the installer (Muffler King in Kirkland WA) for a good sounding exhaust that would not be obnoxiously loud. I love it

inperfectdarkness · 12-04-2007, 06:23 AM

nothing is going to be as quiet as stock.

i had a crack in my old downpipe right before the cat, and the new single-shot catback (with resonator), cat, and downpipe is actually louder than my stock exhaust when it was cracked.

imho, if you can find a way to make the entire cat-back out of a glass-pack resonator, and then use a good muffler--you'd have the best chance of keeping it quiet.

good luck finding someone who makes it.

iufan4lifeul · 12-04-2007, 09:15 AM

my friend has a testpipe back 2.5" exhaust with a Flowmaster 40 series. 1 2.5" in, 2 2.25" out. It sounds like a V8. It sounds deeper and meaner than mustang GT's and V8 camaro's. I will see if I can a video of it for you.

MacGyver · 12-13-2007, 10:18 PM

I have a catalytic convertor and 2 magnaflow mufflers behind it. It's still way louder than stock.

Tqlla · 12-14-2007, 06:41 AM

I put on a 3" in
dual 2.25 out muffler. Yeah... its pretty loud, esp when I let off the gas.

I also put my stock airbox back on. Its quieted the car donw a good amount. I just hope that I can avoid tickets.

gipper72488 · 12-15-2007, 07:58 AM

i have the flowmaster 40 series. i have headers, cat and a full 2 1/2 inch pipe all the way back...it sounds mean but is not too loud. i when i put the muffler on before i had the local shop do the piping it was not really any louder than stock unitl you got up in the rpm range. mines also a single in single out so it would prolly be quieter than the dual out on your 3kgt

carsoncars · 04-24-2008, 08:40 PM

ok this might be stipid but i dont know.. im looking into buying a 94 3kgt, swapping most thing into my 92 stealth, taking the dual piping and rear bumper and onto my car but i want some cool exhausts. ive been looking for something that complements my engine really nice, loud but not ricey. looking into this add, FS: 304 Full Stainless Steel Mufflers - Beyond.ca - Car Forums
any thoughs?

12-03-2007, 11:07 PM	#1 (permalink)
Tqlla Just Bring It Join Date: Sep 1999 Trader Rating: (3)	How does muffler size affect sound? Thoughts on what size to pick up Hey, I have been doing some late night research on which mufflers to buy for my 3000GT(with 192K miles, and dying VR-4 exhaust)... and I have found that people dont actually say anything about which muffler was purchased, spec or model number wise. IE most people will say... purchased a magnaflow, or a flowmaster(though I have see the 40 series mentioned often) Anyway, what size should I get? My tubing is 3" So I am thinking about buying this and putting it where a driveshaft would be, then piping to tips Magnaflow 3" inlet, dual 2.25 output. 5x8x18 Should I go with single in and single out... then y split? Any thoughts? how does size affect sound? I want it Quiet as possible. __________________ 2007 Lexus IS350- power unknown 1994 Mitsubishi 3000GT - 181.6 FWHP

12-04-2007, 06:13 AM	#2 (permalink)
red_stealth grandpa's midlife crisis Join Date: Jan 2007 Location: Snohomish, WA Drives: 1995 Stealth RT Trader Rating: (0)	Re: How does muffler size affect sound? Thoughts on what size to pick up I have a Magnaflow (2-1/2 in - 2X 2-1/4 out) it sounds great without being too loud. Flowmaster 40 sounds good, but will be too loud for my taste. I also kept the first resonator - that keeps the sound really smooth, no raspiness of any kind - just V6 music. I followed the recommendations of the installer (Muffler King in Kirkland WA) for a good sounding exhaust that would not be obnoxiously loud. I love it __________________ Patrick

12-04-2007, 06:23 AM	#3 (permalink)
inperfectdarkness bane of unintelligence Join Date: Jul 2003 Location: Warner Robins Drives: dreaming of a TT ecu Trader Rating: (12)	Re: How does muffler size affect sound? Thoughts on what size to pick up nothing is going to be as quiet as stock. i had a crack in my old downpipe right before the cat, and the new single-shot catback (with resonator), cat, and downpipe is actually louder than my stock exhaust when it was cracked. imho, if you can find a way to make the entire cat-back out of a glass-pack resonator, and then use a good muffler--you'd have the best chance of keeping it quiet. good luck finding someone who makes it.

12-04-2007, 09:15 AM	#4 (permalink)
iufan4lifeul New User - Please be kind Join Date: Dec 2006 Location: louisville Drives: Mitsubishi Lancer Trader Rating: (0)	Re: How does muffler size affect sound? Thoughts on what size to pick up my friend has a testpipe back 2.5" exhaust with a Flowmaster 40 series. 1 2.5" in, 2 2.25" out. It sounds like a V8. It sounds deeper and meaner than mustang GT's and V8 camaro's. I will see if I can a video of it for you.

12-13-2007, 10:18 PM	#5 (permalink)
MacGyver Forum Member Join Date: Sep 2004 Drives: 95 Stealth SOHC Trader Rating: (0)	Re: How does muffler size affect sound? Thoughts on what size to pick up I have a catalytic convertor and 2 magnaflow mufflers behind it. It's still way louder than stock.

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12-14-2007, 06:41 AM	#6 (permalink)
Tqlla Just Bring It Join Date: Sep 1999 Trader Rating: (3)	Re: How does muffler size affect sound? Thoughts on what size to pick up I put on a 3" in dual 2.25 out muffler. Yeah... its pretty loud, esp when I let off the gas. I also put my stock airbox back on. Its quieted the car donw a good amount. I just hope that I can avoid tickets.

12-15-2007, 07:58 AM	#7 (permalink)
gipper72488 Forum Member Join Date: May 2007 Location: G-town NC Drives: dodge stealth Trader Rating: (0)	Re: How does muffler size affect sound? Thoughts on what size to pick up i have the flowmaster 40 series. i have headers, cat and a full 2 1/2 inch pipe all the way back...it sounds mean but is not too loud. i when i put the muffler on before i had the local shop do the piping it was not really any louder than stock unitl you got up in the rpm range. mines also a single in single out so it would prolly be quieter than the dual out on your 3kgt

04-24-2008, 08:40 PM	#8 (permalink)
carsoncars Forum Member Join Date: Apr 2008 Trader Rating: (0)	Re: How does muffler size affect sound? Thoughts on what size to pick up ok this might be stipid but i dont know.. im looking into buying a 94 3kgt, swapping most thing into my 92 stealth, taking the dual piping and rear bumper and onto my car but i want some cool exhausts. ive been looking for something that complements my engine really nice, loud but not ricey. looking into this add, FS: 304 Full Stainless Steel Mufflers - Beyond.ca - Car Forums any thoughs?