Expected power gain from Corsa cat-back/high-flow cats

**LitiGATOR** · 03-04-2008, 10:37 PM

I am on the brink of buying the Corsa cat-back setup and the Magnaflow hi-flow cats. Out of curiosity, what kind of gains should I be expecting? I don't know if it's going to have an effect on my gains, but my current mods are Diablo Predator, AFEII intake and 180-thermostat. Thanks

**blk6.1** · 03-05-2008, 09:42 AM

Originally Posted by LitiGATOR

I am on the brink of buying the Corsa cat-back setup and the Magnaflow hi-flow cats. Out of curiosity, what kind of gains should I be expecting? I don't know if it's going to have an effect on my gains, but my current mods are Diablo Predator, AFEII intake and 180-thermostat. Thanks

10-15hp.

**Super T** · 03-05-2008, 09:46 AM

The cats, headers, and AFE together are good for about 30 (crank horsepower). Add the Diablo for another 25-30 with the mods... so 450-460 crank horse is my guess.

**1FST4DR** · 03-05-2008, 10:17 AM

If it helps I made 404 RWHP with the mods in question.Difference is I run Zoomers/Airaid.Other wise I have the same set up..

**LitiGATOR** · 03-05-2008, 10:54 AM

Thanks for the responses, just what I was looking for. I am doing it moreso for the sound than the power gains, but it's good to hear that I will be getting some decent hp from the mods. Seems like a pretty easy install, but I'm not doing it myself -- would much rather pay someone to do it right the first time.

**rtr0id** · 03-05-2008, 11:00 AM

Originally Posted by LitiGATOR

Thanks for the responses, just what I was looking for. I am doing it moreso for the sound than the power gains, but it's good to hear that I will be getting some decent hp from the mods. Seems like a pretty easy install, but I'm not doing it myself -- would much rather pay someone to do it right the first time.

looks like somebody has moroso on th brain

i guess you'll be heading to the track shortly after this mod

**Husker** · 03-05-2008, 11:04 AM

With my Corsa/airraid and NO diablo I only pulled 374 at the wheels..just FYI I think unless you use a Diablo the PCM will equalize out most changes you make

**LitiGATOR** · 03-05-2008, 12:12 PM

Originally Posted by rtr0id

looks like somebody has moroso on th brain

i guess you'll be heading to the track shortly after this mod

I don't need the mods as a reason to go to the track.

I was there last Friday and I'm sure I'll be there again before the mods! I'm going to try and make it to Tower Shoppes Friday night

**LitiGATOR** · 03-05-2008, 12:13 PM

Originally Posted by Husker

With my Corsa/airraid and NO diablo I only pulled 374 at the wheels..just FYI I think unless you use a Diablo the PCM will equalize out most changes you make

I have a Diablo

**rtr0id** · 03-05-2008, 12:33 PM

Originally Posted by LitiGATOR

I don't need the mods as a reason to go to the track.

I was there last Friday and I'm sure I'll be there again before the mods! I'm going to try and make it to Tower Shoppes Friday night

how'd u do?

post up some times please

**LitiGATOR** · 03-05-2008, 01:00 PM

Originally Posted by rtr0id

how'd u do?

post up some times please

I only went because my brother was taking his new (to him) E55 for the first time. I got there late and it was pretty crowded, so I only got two runs, full tank of gas.

First run was ~ 13.2, bad launch. Second run, I lined up against my brother, and I turned a ~13.1, bad launch. Of course my brother doesn't really know how to launch his car and I killed him to 60', but . . . then he walked me and turned a 12.8! That E55 is a ridiculously fast sleeper, I know guys who are running 12.2's -- stock!

**robsrt** · 03-05-2008, 01:14 PM

I have the same mods as you except I have the magnflow mufflers. I put down very similiar RWHP as 1FAST4DR. So far my best time is 12.71. Looks like your best time isn't far off with the stock exhaust. I would like to hear how it sounds once it's completed. I've been thinking about switching to the Corsa.

**1FST4DR** · 03-05-2008, 01:20 PM

Originally Posted by robsrt

I have the same mods as you except I have the magnflow mufflers. I put down very similiar RWHP as 1FAST4DR. So far my best time is 12.71. Looks like your best time isn't far off with the stock exhaust. I would like to hear how it sounds once it's completed. I've been thinking about switching to the Corsa.

If you do,Let me know.May be interested in your magnaflos...

**robsrt** · 03-05-2008, 01:29 PM

Originally Posted by 1FAST4DR

If you do,Let me know.May be interested in your magnaflos...

It's not the entire magnaflow exhaust. I had magnaflow mufflers welded in place of the resonators and the suitcase muffler removed. Honestly, I've had tons of issues with vibrations with this exhaust and wouldn't feel right about selling it to somebody. Right now, I actually have the midpipes welded to the exhaust to stop the vibration.

**LX HEMI** · 03-05-2008, 01:40 PM

Originally Posted by robsrt

It's not the entire magnaflow exhaust. I had magnaflow mufflers welded in place of the resonators and the suitcase muffler removed. Honestly, I've had tons of issues with vibrations with this exhaust and wouldn't feel right about selling it to somebody. Right now, I actually have the midpipes welded to the exhaust to stop the vibration.

did you weld it all the way around? A tack weld should cure that vibration.