[airtroop01]

Originally Posted by Joshinator99

I’ve got:
2” ceramic coated headers
AWE Touring catback with resonators
Magnaflow center muffler

At 927 WHP last year before Kong ported the blower. I’ll run it again on the dyno soon to see what the porting did for power. Should be able to put 1K WHP through that Magnaflow without a problem. I’m only at 14/15 pounds of boost at that power level so it’s definitely not a restriction…yet…lol.

That’s what I needed to know. Thanks!
I’m at 836 whp now before the Magnaflow install and *think* I’m feeling a little difference in the pedal afterwards. So maybe it’s in my head and/or maybe I need to break it in a bit. Lol.

900-1000 is the goal and I’ll call it done and focus on other mods.
Gotta reel in those EVs after they take off like jack rabbits around here.

[Z OH 6]

Originally Posted by airtroop01

That’s what I needed to know. Thanks!
I’m at 836 whp now before the Magnaflow install and *think* I’m feeling a little difference in the pedal afterwards. So maybe it’s in my head and/or maybe I need to break it in a bit. Lol.

900-1000 is the goal and I’ll call it done and focus on other mods.
Gotta reel in those EVs after they take off like jack rabbits around here.

I think its in your head. Any change in the exhaust note will make you feel that way.

[Joshinator99]

Originally Posted by airtroop01

That’s what I needed to know. Thanks!
I’m at 836 whp now before the Magnaflow install and *think* I’m feeling a little difference in the pedal afterwards. So maybe it’s in my head and/or maybe I need to break it in a bit. Lol.

900-1000 is the goal and I’ll call it done and focus on other mods.
Gotta reel in those EVs after they take off like jack rabbits around here.

No problem.

Originally Posted by Z OH 6

I think its in your head. Any change in the exhaust note will make you feel that way.

Yeah, every time I make a change, especially to the exhaust, it takes a while to get my head to understand what the new normal noises are!

[Katech_Zach]

https://www.summitracing.com/parts/j...4aAsryEALw_wcB

If you want something very similar to the magnaflow, but more of a true "x" insted of a Y-to-y connection internally. Just installed on a customer's ZL1 with ARH headers + Borla Atak (extremely loud). Now the car is very tame and tastefully loud. Jones-MF2469. It had no power loss when doing an a-b comparison compared to the unmuffled exhaust system at 860rwhp.

I will be installing this muffler on my personal ZL1 to try out with my ARH setup + Borla S-Type.

It is more of a factory style "stamped x" rather than an aftermarket "spliced-x" if that makes sense, but still an X and more free flowing than the magnaflow's Y-pipe setup.

We chose to install this in place of the ARH X-pipe that is up front. The packaging on this muffler is a little better than the magnaflow (slightly narrower), so it can be tucked further into the tunnel which is nice.





The body width

[Z OH 6]

Originally Posted by Joshinator99

No problem.



Yeah, every time I make a change, especially to the exhaust, it takes a while to get my head to understand what the new normal noises are!

I think our ears get really tuned in with the exhaust note as certain rpm's and such, when it changes, it makes us feel like the car is doing something different, even though its just the same.

[Z OH 6]

Originally Posted by Katech_Zach

https://www.summitracing.com/parts/j...4aAsryEALw_wcB

If you want something very similar to the magnaflow, but more of a true "x" insted of a Y-to-y connection internally. Just installed on a customer's ZL1 with ARH headers + Borla Atak (extremely loud). Now the car is very tame and tastefully loud. Jones-MF2469. It had no power loss when doing an a-b comparison compared to the unmuffled exhaust system at 860rwhp.

I will be installing this muffler on my personal ZL1 to try out with my ARH setup + Borla S-Type.

It is more of a factory style "stamped x" rather than an aftermarket "spliced-x" if that makes sense, but still an X and more free flowing than the magnaflow's Y-pipe setup.

We chose to install this in place of the ARH X-pipe that is up front. The packaging on this muffler is a little better than the magnaflow (slightly narrower), so it can be tucked further into the tunnel which is nice.





The body width

That's a good suggestion, thanks for sharing.

[airtroop01]

I’ll have to try one of the other solutions, but this Magnaflow one is coming out of my car. It definitely is not in my head… without a doubt it is creating the sound I wanted on the street and picky racetracks with a db limit.

However, above 3200rpm the motor is choked off and I am getting some poor performance and quite frankly it’s just got me bent every time I drive it ever since I put it in.

I called Magnaflow and had a chat with them and they confirmed that 2x 3” inlets go to a single 3” middle and then out to the dual 3” outlet. They sent me the schematic of the insides so I could see for myself.

So basically any gains from a dual 3” exhaust are thrown out because you have a single 3” bottleneck in the middle. I might find a good welder who wants to do some surgery on this muffler to see if it can be salvaged. Short of that I’m ready to run it over with my truck as soon as I can cut it out like a cancer from the body.

[Camaro1973]

Originally Posted by airtroop01

I’ll have to try one of the other solutions, but this Magnaflow one is coming out of my car. It definitely is not in my head… without a doubt it is creating the sound I wanted on the street and picky racetracks with a db limit.

However, above 3200rpm the motor is choked off and I am getting some poor performance and quite frankly it’s just got me bent every time I drive it ever since I put it in.

I called Magnaflow and had a chat with them and they confirmed that 2x 3” inlets go to a single 3” middle and then out to the dual 3” outlet. They sent me the schematic of the insides so I could see for myself.

So basically any gains from a dual 3” exhaust are thrown out because you have a single 3” bottleneck in the middle. I might find a good welder who wants to do some surgery on this muffler to see if it can be salvaged. Short of that I’m ready to run it over with my truck as soon as I can cut it out like a cancer from the body.

I’ve brought this up for over a year and everyone said it wouldn’t lose power….
I just can’t see how there isn’t a bottleneck on a high powered car running both banks into 1 3” pipe.

That’s making each bank 1 1/2” each. It’s why it never went on my car.

[CW3SF]

I did 2 bullet style resonators and have been very pleased with the results

[Joshinator99]

Originally Posted by airtroop01

I’ll have to try one of the other solutions, but this Magnaflow one is coming out of my car. It definitely is not in my head… without a doubt it is creating the sound I wanted on the street and picky racetracks with a db limit.

However, above 3200rpm the motor is choked off and I am getting some poor performance and quite frankly it’s just got me bent every time I drive it ever since I put it in.

I called Magnaflow and had a chat with them and they confirmed that 2x 3” inlets go to a single 3” middle and then out to the dual 3” outlet. They sent me the schematic of the insides so I could see for myself.

So basically any gains from a dual 3” exhaust are thrown out because you have a single 3” bottleneck in the middle. I might find a good welder who wants to do some surgery on this muffler to see if it can be salvaged. Short of that I’m ready to run it over with my truck as soon as I can cut it out like a cancer from the body.

Originally Posted by Camaro1973

I’ve brought this up for over a year and everyone said it wouldn’t lose power….
I just can’t see how there isn’t a bottleneck on a high powered car running both banks into 1 3” pipe.

That’s making each bank 1 1/2” each. It’s why it never went on my car.

927 WHP here with only 14 & change pounds of boost…I feel like if that muffler was restrictive my boost number would be higher to register the restriction, no? So weird.

[KingLT1]

Originally Posted by Joshinator99

927 WHP here with only 14 & change pounds of boost…I feel like if that muffler was restrictive my boost number would be higher to register the restriction, no? So weird.

It's just the laws of physics my friend...a single 3" pipe is only good for 500whp or so before it becomes a restriction. Even a dual 3" exhaust is only good for about 780-800whp before it becomes a restriction. Some of it also depends on the amount of bends and turns.

I wouldn't be surprised at all if you picked up a decent amount removing that muffler. Could be some of the trap speed that you think you are missing. Imo a 1000whp car needs a dual 3.5" system to be restriction free.

[Z OH 6]

Originally Posted by Camaro1973

I’ve brought this up for over a year and everyone said it wouldn’t lose power….
I just can’t see how there isn’t a bottleneck on a high powered car running both banks into 1 3” pipe.

That’s making each bank 1 1/2” each. It’s why it never went on my car.

If it hasn't been dyno'd and proven, then it doesn't count. Butt dyno's aren't accurate. If it's robbing any power, a dyno or track results is the only way to know for sure.

[SOCAL.M6.ZLE]

Originally Posted by CW3SF

I did 2 bullet style resonators and have been very pleased with the results

Do you have any pics?


I was told and worried that (2) resonators wouldnt help enough so i went with the center X muffler. much better.

[Camaro1973]

Originally Posted by Z OH 6

If it hasn't been dyno'd and proven, then it doesn't count. Butt dyno's aren't accurate. If it's robbing any power, a dyno or track results is the only way to know for sure.

King is right though, its simple Physics. I don't trust it, it doesn't make any sense to use it. Maybe on less hp builds.


Even though its a short distance inside the muffler, your still cramming 5.5" (stock) or 6" of pipe into a 3" pipe.