Magnaflow vs. CP-E Cat Back

[Templar]

Hello folks

I want to tune my Mazda speed a bit and I'm ready to order but what exhaust to get?

1) Magnaflow vs. stock
2) CPE vs. stock

Magnaflow: 2,5" with mufflers, how much increase would it give over the stock and how much louder would it be?

CPE: 3", a lots of increase over the stock and very very loud. Is there any way to silence the CPE without too much work?

I'm trying to decide which cat exhaust to get, your thoughts appreciated.

Simon

 

[Rican219]

Happy Medium is get a custom one made. Half the price of CPE (Which is still a great product) and 3 inch over 2.5 and if done right you could still run duals and you can also eliminate the second cat in the custom setup with no need for a test pipe.

 

[pHeeL tHiZ ViBe]

i'm actually wondering the same thing right now...cuz magnaflow can be lots cheaper, and they do know exhaust...and i honestly think the 2.5" will sound better, and won't hurt performance anymore than a 3"

 

[gsrtype1]

the stock is 2.5 manderal bend, the little muffler on the end is just a big resiantor its straight thrugh, manderal bend pipe is VERY expensive, if you swithc to 3 regular ben youll be worse off. The guy at ripleys said he had never seen maderal bend on a stock car and he thought i had a great setup stock he said he would leave it alone!. but cpe and mazdaspeed catback are 3inch manderal bend but there also 700dollars. Most of the backpressure is from the resinators, just delete one or more of the resinators and get a louder deeper not with less backpressure. I was told almost all of the back pressure is from the resinators and the cats. I deleted one of my resinators$42.00 and it sounds deeper and louder even burblles a little and i can delete another when ever i want to go louder

 

[Templar]

Hi there..
What is Manderal bend and is there no backpressure from the stock DP?

I had a customer DP and Excaust put in. It's a 3" DP with 2,5" from half the car back to a Y pipe, from there it's 2". The exhaust guys told me the gasses have contracted so much by the back of the car (cooled down) that a 2" will only create neglible back pressure and give me the sound I want. I didn't want any base or BROOOMMSS when I driving under 3k rpm and that's what I got so I'm happy. I can really notice the power increase, at least 500 more RPM of pull and more kick when the turbo kicks in. Waiting for my CAI now.

Thanks
Simon

the stock is 2.5 manderal bend, the little muffler on the end is just a big resiantor its straight thrugh, manderal bend pipe is VERY expensive, if you swithc to 3 regular ben youll be worse off. The guy at ripleys said he had never seen maderal bend on a stock car and he thought i had a great setup stock he said he would leave it alone!. but cpe and mazdaspeed catback are 3inch manderal bend but there also 700dollars. Most of the backpressure is from the resinators, just delete one or more of the resinators and get a louder deeper not with less backpressure. I was told almost all of the back pressure is from the resinators and the cats. I deleted one of my resinators$42.00 and it sounds deeper and louder even burblles a little and i can delete another when ever i want to go louder

 

[gsrtype1]

i know in the speed3 its manderal mend 21/2inch. manderal ben means that when the pipe bends there are no creasees. like on a regular 21/2 pipe in the bends it will only be 2 inch or less , the creases create backpressure. manderal is 21/2 in the bends too. and its a expensive way to bend!

 

[www.cp-e.com]

We're actually going to look at installing the quieter MS3 oval muffler into the SPEED6 catback either this weekend or next. People have been asking for a quieter alternative for a long time now and we're ready to deliver. If you guys are curious I'll happily keep you updated on our progress. And if you have questions about the original exhaust versus our cp-e exhaust, I'll be happy to answer those questions as well!


Jordan

 

[07MS6]

manderal mend !

(freak)

 

[07MS6]

i'm actually wondering the same thing right now...cuz magnaflow can be lots cheaper, and they do know exhaust...and i honestly think the 2.5" will sound better, and won't hurt performance anymore than a 3"

You dont want 2.5" on this car. Not if your goal is making more power.

 

[Killer]

We're actually going to look at installing the quieter MS3 oval muffler into the SPEED6 catback either this weekend or next. People have been asking for a quieter alternative for a long time now and we're ready to deliver. If you guys are curious I'll happily keep you updated on our progress. And if you have questions about the original exhaust versus our cp-e exhaust, I'll be happy to answer those questions as well!


Jordan

please do.

 

[skylinemonster]

You dont want 2.5" on this car. Not if your goal is making more power.

This man is exactly right. If the goal is to make power, then you will buy the cp-e exhaust. No matter what you or anybody may believe, it is a fact that exhaust should always flow as freely as possible. The cp-e 3 inch downpipe with a built in high flow cat, and the cp-e 3 inch catback exhaust with a 14 inch in-line muffler will be the perfect combination for you. I know because I used to have the magnaflow and I liked it at first because I was coming from the stock exhaust, but after simplifying my setup by getting cp-e, it really opens up the cars performance and not to mention it almost sounds like a 350z or g35 during wide open throttle and down low it is incredibly deep and I love it. Let me give you an idea. Last weekend I raced a jaguar s-type R on the highway, thats a 400hp car with 400 ft/lbs of torque and he had exhaust done, and we were neck and neck. I also have he cp-e cold air and their piggy back computer running a conservative tune and 17.9 psi.

 

[pHeeL tHiZ ViBe]

i just installed the magnaflow catback on my speed6 last friday after work. its sickly sounding!! it owns the CP-E exhaust as far as sounding good. also..why don't you guys get dyno's of stock speeds w/ the two exhaust systems to compare the exhausts. personally i don't see the point of going 3" on a gas motor, i don't see gains til then unless you are pushing some real power..like 500+hp.

even on a diesel truck you don't see any performance gains after 4"

edit: oh and the "magnaflow sounds better than cp-e" statement comes from hearing the two setups on speed6's around town. but then i realized that the cp-e can have different muffler combo's..so it would sound different depending on which mufflers you buy (2thumbs)

 

[thabigo]

i always thought that the 3" exhuast is better for turbo charged engines.....

 

[bbakken82]

The 3 inch is definitely better and I called magnaflow back when I was looking at which one to order and magnaflow themselves said that their catback only added at most 7 horsepower. I went with the cpe it is sweet. I only wish it was a little quieter so if I can get a quieter muffler without sacrificing power I would love it.

 

[thabigo]

bbakken what set up did you get with Cpe. only 14 in muffler or did you get axe back as well??

 

[mdogg]

Let me give you an idea. Last weekend I raced a jaguar s-type R on the highway, thats a 400hp car with 400 ft/lbs of torque and he had exhaust done, and we were neck and neck. I also have he cp-e cold air and their piggy back computer running a conservative tune and 17.9 psi.

Not to sound doubtful.... but.... seriously? You were keeping up with a 4.2L S/C V8???? This car isn't slow by any means, but the s-type R is SICK. At anything other than a very slow roll I would think he would pull like there is no tomorrow.... I'm sure the CPE standback definitely helps your case though...

have you been to a dyno with your current setup?

 

[Killer]

This man is exactly right. If the goal is to make power, then you will buy the cp-e exhaust. No matter what you or anybody may believe, it is a fact that exhaust should always flow as freely as possible. The cp-e 3 inch downpipe with a built in high flow cat, and the cp-e 3 inch catback exhaust with a 14 inch in-line muffler will be the perfect combination for you. I know because I used to have the magnaflow and I liked it at first because I was coming from the stock exhaust, but after simplifying my setup by getting cp-e, it really opens up the cars performance and not to mention it almost sounds like a 350z or g35 during wide open throttle and down low it is incredibly deep and I love it. Let me give you an idea. Last weekend I raced a jaguar s-type R on the highway, thats a 400hp car with 400 ft/lbs of torque and he had exhaust done, and we were neck and neck. I also have he cp-e cold air and their piggy back computer running a conservative tune and 17.9 psi.

Please post street racing experiences in the proper street racing forum. Not many of us care for people risking their lives and others for the sake of a cheap thrill.

Thanks.

 

[pHeeL tHiZ ViBe]

Please post street racing experiences in the proper street racing forum. Not many of us care for people risking their lives and others for the sake of a cheap thrill.

Thanks.

eh i don't care for it...but i don't mind them. just they can generally be :bs:

and i don't remember magnaflow coming out and saying they only gain 7hp maximum?

 

[kurfgator]

The magnaflow won't have the same gains the CP-E does. The thing with a turbo car is you want as little backpressure after the turbo as you can get. The turbo runs on this pressure differential. The Magnaflow is not a bad system. They design their stuff for the daily guy. Someone who wants a little more grunt and improved sound without the high noise level and clearance issues of a 3" (my custom 3" seems to need adjusting all the time). The Magnaflow is also a whole lot cheaper. I've seen it for $392 shipped!!!

 

[bbakken82]

Thats what magnaflow said when I called them.