catbacks exhaust mods

**docjohnson2000** · 11-07-2010, 09:01 AM

hi everyone thanks for being here to help. i have a 2000 ws6 m6 with 21,000 miles on it. ilet it sit for years because of college and kids and i raced motocross in the national vet series so i never used it. well im back i put in a k&n filter and 3.73s other than that its bone stock and brand new. my question is i want to do a cat back system that makes it loud at idle and lets people know theres something on the car. i was thinking of the magna flow any help from out ther would be greatly appreciated... thanks doctorj.
then whats else is good for boltons?

**666ws6** · 11-07-2010, 10:02 AM

Well, there are a lot of exhaust options out there. But if you want people to know your car is nicely modded, you'll have to get a cam so you can have a lopey idle. That, with headers will give you serious HP gains and make it sound menacing. So if you have the ability, do a nice cam, headers and exhaust, then get the car tuned... from that point, any exhaust will sound nice.

**nhraformula** · 11-07-2010, 01:55 PM

If you want people to know your around, theres two options, 1st is long tube headers, off road y-pipe and a magnaflow exhaust, 2) adding a cam to mentioned combo.

**tatertot91** · 11-07-2010, 02:46 PM

a Magnaflow is never going to sound loud at idle without a cam. I put my magnaflow on and it sounded a little louder than stock and when i put longtubes and an ory on it it only made it a bit louder at idle. Sounds mean at 2k up but below that it's relatively quiet.

If you dont ever plan on longtubes and removing your cats, get a loudmouth 1 or a GMMG if you can swing the cash
Otherwise you probably want something like a borla
Check out ls1sounds.com, should give you an idea of what you're looking for

**Firebirdjones** · 11-07-2010, 05:06 PM

The magnaflow is pretty tame noise wise. If you really want something that makes noise at idle and wide open throttle with a deep sound that no other single catback system I've heard has duplicated, from my experience I would prefer the Mufflex.

**Blue28** · 11-07-2010, 05:35 PM

Get a SLP air filter lid, also a Hooker cat-back flows and sounds good!
You also can just pull off the factory catback and install a Magnaflow SS bullet muffler on the end of the Y-pipe then add a turn down before the rear axle tube. This will give it a good sound(IMO) for under $150 and all in stainless steel.

**RyanJM** · 11-07-2010, 05:46 PM

The hooker kit sounds good as long as you have cats it's little rasptywith lt's and a ORY. Gotta plan on whether or not you plan on doing headers and a carted or ORY 1st then choose the catback. I actually just welded a flowmaster in when the car had the factory exhaust and sounded good till the lt's and ORY then it had to go. I swapped in the slp powerflo which is deep at idle but not loud till above 3k at wot and by 6k shift.point it is screaming. Waiting to.see what affect the ms3 will have on the sound when I get it back. I like the magnaflow if you have headers with no cats but it is too quiet on a stock manifold w/ cat setup. So soon as you decide how far you wanna go then pick the catback. Also Texas speed has a nice setup with a dynomax bullet that is loud and deep with factory cats bit loud extremely loud without.

**Blackbird WS6** · 11-07-2010, 07:56 PM

GMMG or borla is what your going to want.....hooker sounds like

**c5z28** · 11-07-2010, 08:48 PM

No catback on a stock car is "loud". Sure some have some light rumble to them but they are all tame at idle until you step on them. If you want loud at idle remove the cats and the muffler-friend did that and his car was louder than mine. I have longtubes and duals

If you want the more aggressive of the options blue28's is a good option. Not a lot to baffle the sound and just enough muffler to keep it from sounding like a truck.

**Mike0202** · 11-08-2010, 08:15 AM

Originally Posted by docjohnson2000

hi everyone thanks for being here to help. i have a 2000 ws6 m6 with 21,000 miles on it. ilet it sit for years because of college and kids and i raced motocross in the national vet series so i never used it. well im back i put in a k&n filter and 3.73s other than that its bone stock and brand new. my question is i want to do a cat back system that makes it loud at idle and lets people know theres something on the car. i was thinking of the magna flow any help from out ther would be greatly appreciated... thanks doctorj.
then whats else is good for boltons?

On stock manifolds the only one that is going to be loud is the loudmouth1, or an exhaust cut out. If I was you I would get long tube headers and a 3" ORY. That will make everything loud except maybe slp/dual/dual or magnaflow

**c5z28** · 11-08-2010, 04:05 PM

Originally Posted by Mike0202

On stock manifolds the only one that is going to be loud is the loudmouth1, or an exhaust cut out. If I was you I would get long tube headers and a 3" ORY. That will make everything loud except maybe slp/dual/dual or magnaflow

Neither will be loud at idle, at wot but not idle.

**Mike0202** · 11-08-2010, 06:09 PM

Originally Posted by c5z28

Neither will be loud at idle, at wot but not idle.

Thats true. Most LS1 cars I have heard were quiet at idle. Even a few heads/cammed setups.

**BashamWS6** · 11-11-2010, 08:37 AM

if you want cheap and loud...go with loudmount II. nice rumble not alot of rasp. very fucking loud with ORY and LTs

**Blackbird WS6** · 11-11-2010, 09:57 AM

the TSP catback is $235 or something like that if want cheap and not a POS lol....i never heard or used that setup so i cant really comment how it sounds

**Justin23454** · 11-11-2010, 10:42 AM

you could also get a cutout. Cheap way to sound better. (with LT'S)

**BashamWS6** · 11-11-2010, 07:01 PM

TSP is cheap but their sound can get a little raspy...but with stock manifolds and y...i think the Texas Speed Rumbler sounds great... id consider a Catted Y if you go with LTs and and the Texas Speed Rumbler. and i agree with the cutouts.

**Blackbird WS6** · 11-11-2010, 07:22 PM

Originally Posted by BashamWS6

TSP is cheap but their sound can get a little raspy...but with stock manifolds and y...i think the Texas Speed Rumbler sounds great... id consider a Catted Y if you go with LTs and and the Texas Speed Rumbler. and i agree with the cutouts.

http://www.ls1.com/forums/showthread.php?t=145459

**BashamWS6** · 11-11-2010, 07:27 PM

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Here ya go DOC. great chance on a buy here.

hey blackbird...do you have an aftermarket hood?

**xmarkx** · 11-11-2010, 07:54 PM

I cut my muff off and it's loud at idle. I have stock manifolds and cats so it's sounds alrite. people who have done no muff with LT or ory or both say it sounds like shit. the only thing that sucks is the drone while cruising.