View Full Version : Just put on Magnaflow catback


Shackleford
05-09-2008, 11:44 AM
It has a nice, deep sound to it. I like it. I now have an MTI lid and Magnaflow catback. What am I probably making to the wheels now with the lid and catback? ET?

melchoir
05-09-2008, 11:47 AM
+7rwhp. Probably take a tenth off your ET.

Shackleford
05-09-2008, 11:48 AM
+7rwhp. Probably take a tenth off your ET.

Lid and catback?

AcademyRumblebees
05-09-2008, 11:49 AM
Sweet. I just put on my MTI carbon fiber lid and have been looking at magnaflow catback exhaust. Let me know how you like the combination!

Any idea where to get the best price on magnaflow catback systems?

Pat

Shackleford
05-09-2008, 11:51 AM
Sweet. I just put on my MTI carbon fiber lid and have been looking at magnaflow catback exhaust. Let me know how you like the combination!

Any idea where to get the best price on magnaflow catback systems?

Pat

I got mine used locally for $125. :D

I really like the sound of the Magnaflow. I'm going to put on some high-flow cats next.

AcademyRumblebees
05-09-2008, 12:00 PM
Damn! Nice going on the price.

I have been interested in the magnaflow's for the reason of wanting something different. I had flowmaster 50 series delta flow on my hemi ram, the sound was so-so. Need something more agressive for the camaro

95 Z28
05-09-2008, 12:02 PM
heavy6.0 is a sponsor here and has them for like 390 shipped. Bets price I've seen.

Shackleford
05-09-2008, 12:14 PM
Damn! Nice going on the price.

I have been interested in the magnaflow's for the reason of wanting something different. I had flowmaster 50 series delta flow on my hemi ram, the sound was so-so. Need something more agressive for the camaro

I'm sure you've heard Crapmaster. Magnaflow is way better than Blowmaster.

stockerws6
05-09-2008, 12:16 PM
Lid and catback?

What were you expecting? A lid and catback aren't going to add much. Probably more than 7rwhp like stated though. More like 15-20 I would think.

Shackleford
05-09-2008, 12:25 PM
What were you expecting? A lid and catback aren't going to add much. Probably more than 7rwhp like stated though. More like 15-20 I would think.

I was expecting the 15-20 rwhp like you just said.

Canuck13
05-09-2008, 04:30 PM
I bought my car with magnaflow cats and pacesetter headers on it and get lots of compliments on the sound, but I live in a small town, not many modded cars around to compare too, 'cept for a few civics with fart cans.

98Z28MASS
05-09-2008, 04:53 PM
I was expecting the 15-20 rwhp like you just said.

As stated above I wouldnt expect to see much more than 5-7 rwhp with lid and catback. 15-20 rwhp would be if you had done headers and ory with the catback and lid. Also, you have to remember you had a 98, which has the worst flowing heads by far of all the years and an ls1 intake. Guys who see 20-25+ rwhp with headers/ory/catback/lid are usually those who have 01-02 ls1's as they had the best flowing heads and the ls6 intake. Dont be dissapointed though, just all the more reason to toss a cam in there!

mikenews
05-09-2008, 04:55 PM
Read my sig... i went from 9.4 to 8.8 with cb and free mods! I have not re-ran the car yet with the addition of the vinci tuner. The magnaflow setup does get louder after 2 to 3k of break-in miles.

98Z28MASS
05-09-2008, 04:56 PM
I bought my car with magnaflow cats and pacesetter headers on it and get lots of compliments on the sound, but I live in a small town, not many modded cars around to compare too, 'cept for a few civics with fart cans.

Magnaflow sounds awesome on all setups IMO. I ran a magnaflow catback with headers/ory/232-238 cam and it sounded sick. Really tones it down while still providing a nice rumble. Best exhaust I have ever heard though was a true dual setup running no cats, x-pipe, and borla XR-1 bullet mufflers run out the back of the car. That would be my choice if I could have any exhaust with a dual setup with magnaflow mufflers being a close second.

hoss 2000 z-28
05-09-2008, 05:00 PM
Congrats on the install. I bought my car with a Flowmaster kit on it and the damn thing rusted. Magnaflow is pure stainless steel so it will never rust and fall apart like POS aluminized steel. Take this lesson further, don't get coated headers that will rust... get some stainless headers!

titiz28
05-09-2008, 05:04 PM
I hesitate to put a Magnaflow or a LM2 (more aggressive sound) on my car (I currently have the single exhaust for the export version:bang:) but I don't know which one is the best. I have also ordered a SLP air box and will modify my MAF personnaly from 75 to 85mm. I will wait for september for more infos from the forum to know what else I will modify.

KBG
05-09-2008, 05:08 PM
It has a nice, deep sound to it. I like it. I now have an MTI lid and Magnaflow catback. What am I probably making to the wheels now with the lid and catback? ET?

pretty much same setup as you - lid, catback, and tune and I ran a 13.07 @ 106

zracer323
05-09-2008, 05:21 PM
Sweet. I just put on my MTI carbon fiber lid and have been looking at magnaflow catback exhaust. Let me know how you like the combination!

Any idea where to get the best price on magnaflow catback systems?

Pat

I just picked up mine from speedtweekers in the sponser sales section for $390 shipped. Can't wait to put it on!

Jigen
05-09-2008, 06:45 PM
If one was stock like the OP and went for a new Y-pipe like the SLP one in addition to the catback, would that help out with freeing up a little HP?

98Z28MASS
05-09-2008, 09:39 PM
If one was stock like the OP and went for a new Y-pipe like the SLP one in addition to the catback, would that help out with freeing up a little HP?

Maybe an additional 2-3 rwhp, but you would probably be better off just gutting your stock cats and making your own catless y-pipe. I would say just save the $100+ (not sure what the slp y-pipe costs) and put it towards some headers and ory.

Shackleford
05-09-2008, 10:36 PM
If one was stock like the OP and went for a new Y-pipe like the SLP one in addition to the catback, would that help out with freeing up a little HP?

Or you could get some high-flow cats. That's next on my agenda.

miamifan3413
05-10-2008, 11:03 AM
I've always been a Magnaflow fan.....they have great quality sound, quality made, lifetime warranty......what more could you ask for???

nitrouspowrdss
05-10-2008, 11:15 AM
As stated above I wouldnt expect to see much more than 5-7 rwhp with lid and catback. 15-20 rwhp would be if you had done headers and ory with the catback and lid. Also, you have to remember you had a 98, which has the worst flowing heads by far of all the years and an ls1 intake. Guys who see 20-25+ rwhp with headers/ory/catback/lid are usually those who have 01-02 ls1's as they had the best flowing heads and the ls6 intake. Dont be dissapointed though, just all the more reason to toss a cam in there!


Not to burst your bubble but my car picked up 30 horse and 34 tq when I put my long tubes on. I already had an MTI lid and an SLP 2OTL cat back so the supporting mods were there.

98Z28MASS
05-11-2008, 09:16 AM
Not to burst your bubble but my car picked up 30 horse and 34 tq when I put my long tubes on. I already had an MTI lid and an SLP 2OTL cat back so the supporting mods were there.

Not bursting my bubble at all as there are some very generous dynos out there so they are just a basic tool to estimate power gains. Real gains are on the track. On average though most people will see 15-20 rwhp with headers ory on a pre 01 ls1 and approx 20-25 on a 01+ ls1. Ive seen guys claim 360+rwhp with longtubes and full exhaust and minor bolt ons (ls6 intake, lid, ported TB) and we all know thats very generous. My 98 z28 with a custom grind 232/238 cam, ls6 intake, ported stock tb, headers, ory, magnaflow, 25% pulley, lid, and full tune by Dez Racing only put down 370 rwhp on the dyno (and I was an M6 with stock 3.42 gears) however on the street and track I was able to outrun cars (including other ls1's) with dynosheets reading up to 400 rwhp and it wasnt due to driver error.

jebuzws6
05-11-2008, 02:18 PM
Not bursting my bubble at all as there are some very generous dynos out there so they are just a basic tool to estimate power gains. Real gains are on the track. On average though most people will see 15-20 rwhp with headers ory on a pre 01 ls1 and approx 20-25 on a 01+ ls1. Ive seen guys claim 360+rwhp with longtubes and full exhaust and minor bolt ons (ls6 intake, lid, ported TB) and we all know thats very generous. My 98 z28 with a custom grind 232/238 cam, ls6 intake, ported stock tb, headers, ory, magnaflow, 25% pulley, lid, and full tune by Dez Racing only put down 370 rwhp on the dyno (and I was an M6 with stock 3.42 gears) however on the street and track I was able to outrun cars (including other ls1's) with dynosheets reading up to 400 rwhp and it wasnt due to driver error.


damn thats is sick.. those mods are in my to do list pretty soon

SlayerMaro
05-11-2008, 02:28 PM
Good choice with the Magnaflow. Everyone compliments how my car sounds with longtubes, ORY, Magnaflow, and a cam.

JayplaySS2
05-11-2008, 02:37 PM
The Magnaflow is my favorite exhaust. It made my 02 SS so nice and mellow until WOT, I loved it. Just look and see if your tail pipes are straight. My driver side pipe was crooked and I had to take it to a muffler shop and have it removed to bend it slightly for $40. Stand at the back of the car and look down. Same thing is going on my next car.:D

odarabla
05-11-2008, 03:38 PM
If you wana hear what Maganaflow exhaust sounds like go to the 11 second threads. I have a post in there of my car at the track. I also have a idle clip.

Shackleford
05-11-2008, 04:08 PM
The Magnaflow is my favorite exhaust. It made my 02 SS so nice and mellow until WOT, I loved it. Just look and see if your tail pipes are straight. My driver side pipe was crooked and I had to take it to a muffler shop and have it removed to bend it slightly for $40. Stand at the back of the car and look down. Same thing is going on my next car.:D

No. They're crooked. I might get it straightened. lol.

98Z28MASS
05-11-2008, 08:41 PM
damn thats is sick.. those mods are in my to do list pretty soon

Yea the car was definately fun and Don at Dez racing (aka slowhawk on this board) did such a good job tuning it that it had fantastic idle quality even with a large cam in there. I have an idle and rev clip of my setup if you want. Just click this link:

http://s8.photobucket.com/albums/a28/99sscamaroma/?action=view&current=Magnaflow232238orymacs.flv

LS184
05-11-2008, 10:51 PM
Read my sig... i went from 9.4 to 8.8 with cb and free mods! I have not re-ran the car yet with the addition of the vinci tuner. The magnaflow setup does get louder after 2 to 3k of break-in miles.its gnna take tht many miles to break in? :bang:

JayplaySS2
05-12-2008, 11:25 AM
No. They're crooked. I might get it straightened. lol.



:D Figures. Its an easy fix for a muffler shop. They were pissed at me, I was under there with a tape measure making sure it was exact when they finished. Its only off by 1/4 inch but it is noticable. Magnaflow should correct thier jig. Still the best CB IMO.

Camaro396
05-12-2008, 03:56 PM
My magnaflow = too quiet but good tone.

http://i51.photobucket.com/albums/f398/kaciphillippi/th_MVI_0430.jpg (http://s51.photobucket.com/albums/f398/kaciphillippi/?action=view&current=MVI_0430.flv)

SD99TA214
05-12-2008, 04:21 PM
slp l/t's, slp ory, magnaflow c/b......AMAZING sound, cant wait for my cam install!