GRok25

Will The Hahn 3" Catback Work with the 2.4 N/A Engine?

I think this exaust was ment for the TC or SC Cobalts.
my thought is 3" is to thick for the N/A.

1) will this fit my car?
2)Will this make me loose performance or back pressure?

blackss2.0

You don't want 3". It's not even suitable for my car. Might sound cool but yes you will lose power.

mexi_loco

iTrader: (7)

No it will not fit (at least with the stock downpipe). Yes, you will lose power (unless you're s/c'd or t/c'd).

GRok25

thats what i was thinking.

So now im stuck between the magnaflow and the corsa catbacks? any thoughts?

mexi_loco

iTrader: (7)

I'll tell you the same thing I tell everybody. Think about what you want to do to your car in the long run. I mean REALLY think about it. Are you trying to go with some simple appearance mods, or *****-out performance (like supercharging or turbocharging)? That's honestly going to affect what you're going to want as far as an exhaust.

If you're seriously considering turbocharging or supercharging your car in the future, my best advice is to hold off on getting the exhaust right now so that you don't waste money or time correcting a mistake. Trust me, I'm paying for it right now.

GRok25

No im gonna stay NA.
so in your opinion which will give me the most performance and best sound
the Magnaflow SLP or the Corsa?

mexi_loco

iTrader: (7)

Honestly, in your case, even the ARK fart can will give you some gains. The point of having an aftermarket exhaust (in your case) is to have an equal size diameter throughout the entire exhaust. This will ensure little to no restriction of exhaust flow. In other words, In order to maximize the performance, you would need a header, and a 2.5" downpipe and 2.5" from the catalytic converter (a*k*a the "cat") back. Make sure you have a cat on that downpipe (no need to go cat-less since you're staying n/a).

But as far as gains, any 2.5" cat-back is only going to net you about a 1-5 hp gain MAX. Very rarely will they actually give you a 10 or 12 hp gain over stock. As far as sound goes, that's a matter of your own opinion. Go on youtube and look up some sound clips and compare them.

Red08Sport

find an exhaust shop and have then make you one. its a lot cheaper and you can choose your muffler. i have a magnaflow custom. and sounds good. i only paid 300 for everything.

mexi_loco

iTrader: (7)

well, the problem with getting any shop to do it is that they might not use a mandrel bender, which means there's no guarantee that even if it's a 2.5" that it's free-flowing.

GRok25

ok thanks i will prob go with the magnaflow 2.5

Do you know of any high flow cats or headers that are 2.5"
(the cat back,the cat, and the headers is all that i need to complete the system right?)

mexi_loco

iTrader: (7)

look at zzp's exhausts, headers and downpipe. Best performance for the buck. And you can trust them.

GRok25

(i dont wanna go catless.)

I dont think ZZP makes the catback or the cat but if you can send me a link for the headers that would be awsome.

mexi_loco

iTrader: (7)

Downpipe: Cobalt & Ion ---> ZZ Performance

Header: Cobalt & Ion ---> ZZ Performance

And you're right, they don't make a 2.5" exhaust. I thought at one point they did. But take a look at ARK or even Meagan Racing. There's definitely much cheaper options than Magnaflow and Corsa for you.

GRok25

ok thank you so much. 1 last thing if i choose to go with that downpipe will i have to remove my cat? because i dont wanna go catless because i think its illegal in NJ.

mexi_loco

iTrader: (7)

they give you an option to go cat-less or to slap on a Magnaflow high-flow cat for 50 bucks more. Put the cat on there, you will actually lose power on there. But if you send them your old downpipe with the cat, they will refund you 50 bucks.

GRok25

So i will get more performance if i go catless.
And do they give you the option on the header link or the downpipe link?

GRok25

o ok i see what is the 02 wideband (option 2 in header link)

mexi_loco

iTrader: (7)

they give you options for both. You can also call them if you have any questions about their options. As far as going catless, don't. You don't need to. You will actually lose power. N/A engines actually need a little restriction on the exhaust side, which can be provided by the cat.

GRok25

so i would be fine and set with a full exaust with the ZZP Long tube header package with the added magnaflow cat.

mexi_loco

iTrader: (7)

that wideband o2 bung is for people that want to run a particular gauge that measures air/fuel ration coming out of the exhaust. This information given by this gauge helps a person reprogram/reflash the car's computer in order to optimize the air/fuel delivery (also known as "tuning"). This gauge requires the use of a special o2 sensor known as a wideband o2 sensor. Your car uses what's known as a "narrowband" o2 sensor because it only reads between a certain voltage.

Basically, it's for another o2 sensor that you don't have or need. So you would choose "no extra bung" for this option.

GRok25

so i think i should go with the headers with the added cat rather than the downpipe with the added cat because then i would not get the headers.

mexi_loco

iTrader: (7)

the link to the headers is actually a combo package. In other words, if you purchase the headers, they will throw in their downpipe for no additional cost (since no other downpipe fits their headers). The downpipe link is only if you choose not to buy headers from zzp.

GRok25

ok thank you soo much im new to the game so i needed a lesson lol.

Now which option am i going to want to choose for option 3 (1)3" weld in 2)Bolt in 3)Bolt in for zzp catback) because the magnaflow catback is going to be 2.5" and i think the header/downpipe is 3".