hahaha I am gunna see. gotta start doing some research on mufflers.

Thanks for editing my post there Matt, haha.
4" would be sick, I would need a ten foot wing to keep me grounded

Go for it. YA 4" with a 6" tip

That should be good for at least 10 hp

I dont think a 4" exhaust pipe will fit, the most i could run on the 2000 is 3 1/2" but the price was just to much of a jump over the 3" pipe. As for the mufflers go with Hooker, if you can run the 3 1/2" pipe here is the muffler you want
http://www.holley.com/21509HKR.asp

I have twin 3" mufflers on my wifes car and they sound just as good today as they did when we put them on 6 years and 140,000 miles ago. But you know that.
http://www.holley.com/21513HKR.asp

ROD

Awesome, thank you for the link Rod, I am definitally going to persue the 3" option.
i love the way yours sounds at idle.
all i need is an exhaust shop to fab a Y pipe and new hangers as i have a single in dual out muffler

I got my Y pipe at the exhaust shop 3" in and twin 3" out, 3" all the way to the tips.
Cindy'* car sounds good at speed to
http://s90.photobucket.com/albums/k2...rent=flyby.flv

5th car back.

ROD

Ooooooh....Ahhhhhhh......Listen to the sound of Magnaflow. :P

Heard one fart can, heard them all. Paul, didn't that cop in Oregon teach you anything.
Although i must say Paul'* car sounds damm good on the inside. Matt you might want to look at the Hooker "Maximum Flow muffler"
http://www.holley.com/types/Maximum%20Flow.asp
These also have a deep sound, and since the muffler'* are at the back of the car the
packing should not burn out(not much heat back there), plus you will need a new resonanter.
For that the Moroso Spiral Flow Racing Mufflers works or take a look at this muffler it'* a little expensive
http://www.dnamufflers.com/DNA/street.html
I have the Moroso and i am very happy with it. But don't be afraid to try something new
you don't want to sound like all the other L67'* out there.

ROD

Yes it'* true.
Magna....meaning a lot........Flow.....meaning power. :P

Glad ya caught that Rod.

Cop taught me one thing. You can hide but you can't run.

When I fart. I fart LOUD.

I did a quick search:

"Finally good information to base muffler choice on! Excellent site to hear muffler sounds if you have the LS1 engine.

http://ls1sounds.com/

Which muffler flows the best?
Supposedly this review was performed by Martel Brothers:

All tests via an independent lab
All tests @ 15” wc

2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM

2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM

2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM

2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM

Standard OEM 2 ¼” Inlet/Outlet 138-152 CFM
Standard OEM 2 ½” Inlet/Outlet 161-197 CFM

The mandrel bending of the pipes done by aftermarket exhaust companies is good for 2-4 hp depending on the severity of the stock bends. Most local exhaust places don't have a mandrel bender so changing the pipes out doesn't do anything if pipe size it not increased.

My opinion, if its more noise and a little more power just add the best flowing stainless muffler to the current system and never do it again. If you increase pipe sizes, then a local shop and only stainless. Don't care about money but want ease and better gains than most local shops can offer with no pipe size increase, and aftermarket exhaust.

NOISE does NOT equal POWER!!!

Which muffler is quietest but makes the most power?
This test was performed by 5.0 Mustang & Super Fords Magazine, December 2002 issue (page 55) on a '90 Mustang LX coupe with 370hp and 11 second potential. 66 pulls were made for this comparison:

The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq

Sound Off in Quietest to Loudest (Decibels):
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).

Hooker Maxflow 1st in flow, 3rd in H.P., 2nd Quietest muffler that they tested."

Like they said "NOISE does NOT equal POWER"

ROD