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in the next week or so i'm gonna order the HP racing header and Megan high flow cat/test pipe. but before i order these items and put them on my car. i'm guessin my exhaust will become louder after i've added these parts. ohhh yea i already have the evo catback on my ride. and will the CEL come on at all. will the high flow cat make my exhaust smell or w/e. i've already read these items add great lowend torque and some hp. so thats my i'm investing in them. any feedback from anybody that has these parts would be awsome.

 
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if you think you are going to get much power out of this, you are wrong. You might be lucky and get 2-5 HP, that is if you are lucky. I have a custom catback and high flow cat, and it is honestly good for just sound. I dont really feel any power difference. Ours cars dont do well with any I/H/E setup. Best bet would get a turbo or engine swap. or build up your engine internals. Oh and BTW, I saw you are getting the header, you still wont get a big gain, maybe 1-3 HP extra.

 
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i have the megan cat and it does smell. but when driving, you wont smell it since its leading on the to the driver behind you i smell it when i warm up my car every morning. doesnt smell like **** or crap, more like those big trucker pollutions.

as for the cel, when i installed the megan cat, my malfunction lamp went on and stayed on. i think its because i didnt disconnect the battery before installing it. but i tried disconnecting it after but it just came back on. i guess im just out of luck

performance: more responsive and noticed a gain with it. im running with sri and megan test pipe/cat btw.

hp header: good choice, but your only gonna need an top portion header or the "shorty header" if your going with the megan resonator test pipe/cat. if you buy the hp race header, it wont bolt on to ur megan hi flow cat.

yes, it will increase the sound of your exhaust because its more hi flowing then the OEM exhaust/cat/header.

hope that helps.

 
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Ok to make more since of what I said, you might feel better response, but you still wont get much gain from anything bolt on to our car, except a turbo, nitrous, or swap.

 
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one night on the freeway, i wanted to see what my top speed is stock. so i went and did it and turned out i only got to 112mph on my civic from the onramp to the bridge.

when i installed my intake, i did the exact same thing on the same onramp to the bridge, it got up to 116mph.

if you can give me solid proof that headers/exhaust/cat does not increase hp or torque, ill take your word for it.

 
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hmmmmm that sux then ... i guess screw all that and start piecin together turbo kit

 
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Ask anyone on this site, they will tell you that I/H/E will give you about a 1-10 HP increase, which in my eyes is ****. Before I even knew about this site, I bought an intake because I always heard it would give you asn extra 5-10 HP, well I was wrong, just good sound. our cars have a restricted ECU which doesnt let it have much power.

 
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See that is a better idea.

 
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OR.... just keep all your bolt ons that you already bought and buy nitrous so it doesn't seem like you wasted all that money on ur bolt ons... Best bang for the buck and you'll have a 14 second car.

 
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But also remember nitrous isnt constant HP. when ever you want added HP, you have to use nitrous and it does run out. Yea it is the best bang for the buck, but most people want constant HP.

 
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Why would you want constant hp for the street? Do you need 200 hp in our civic to go the grocery store? Turbo isnt' practical unless your auto crossing when constant power is needed. If you race at the track or street race, flip the switch and you have that power all night. I believe in some magazing they installed a 50 shot in our car and got like 170 hp to the wheels and over 200 ft/lbs. Then turn it off when u go home and get that 30 mpg fuel economy when your not racing.... Sounds like a good way to save money to me.

 
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Well our car wouldnt get 170 HP and 200 ft/lbs with a 50 shot. Our car stock has about 110-120 HP, unless the car was already modifed, but there is no way a 50 shot will give that much power. Besides even with a 50 shot, you arent going to get 50 extra HP, maybe about 35-40 tops. with each shot, you get less added HP from it. I would love to have constant HP, it makes the car quicker. My civic is so damn slow. I would rather have over 200 HP, or something alot quicker. Now using nitrous all the time, you will run out, what are you going to do then? If you keep using it all night at the track, you will run out. And with all that nitrous, your MPG is going to decrease, even when it isnt in use.

 
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addin a 50 shot of juice isn't gonna make ur HP around 170hp. maybe on another car but not on our civ's

 
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the only way to gain HP is with a turbo or K20 swap ..... or K20 turbo !!!!

 
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those arent the only way. those ways give you the most power. Building your internals will give you more HP. Adding a intake, exhaust will give you HP, not much on our car, but it will. There are alot of things that will give you added HP, not just a swap or turbo.

 
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but for big numbers ... yea you can do internals but personally i'd rather do a K20. much more potential in that motor overall

 
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http://www.hondatuningmagazine.com/tech/0203ht_nx/

Try doing research before saying that im wrong. And if you wanted a fast car, you would not be buying a civic. You buy them for reliability and fuel economy. And how BTW would nitrous decrease fuel economy when its not in use.... That makes no sense what so ever.....

 
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WOW im sorry... 210 FT LBS at 3500 rpms... i only said 200 so i guess i did lie.

 
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I still dont believe it, making over 70 HP from that. If that is the case, I will buy some nitrous. but whatever. And it will decrease your gas milage. The longer you use nistrous. Over time your engine is going to have added wear from it and it will eventually lower your MPG's. It will also add to other problems. Just like adding a turbo, your engine wont last as long as one without a turbo.

I bought a civic because I am not rich. If I was rich, I would have boughten something else. The civic was in my price range. It isnt what I wanted, but I cant be picky, at least I got a car.

 
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so what your pretty much saying is investing into intakes/headers/exhaust/cat is a watse of money... not "doesnt give any gains".

yes, the civic is an economy car. but i dont see why not an economy and a performance car. whats your reaction to 12 second civics out their?

 
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besides, if that was the case, I think alot of members would have gotten nitrous. I think they over exagerated the HP increase, maybe to convince more people to buy it to help out nitrous express. that is my opinion though.

 
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I didnt say it is a waist of money, but the new generation civic doesnt give much power with the mods. yes older cars do, but not this generation. ALot of cars do well with the I/H/E setup, but ours dont.

 
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this thread went off topic like crazy lol..

but yeah, you will notice somewhat power gains with the megan hi flow cat and hp headers. i wouldnt expect your car to be some kind of jet afterwards though

 
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i'd rather get turbo then add nitrous since they go hand in hand with each other

 
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Read the article and it states clearly they got 170 hp and 210 ft/lbs on a properly installed nitrous system. Also Its gonna have the same engine wear if not less then a turbo system because it is not being used all the time. A properly cared for and installed system should not be dangerous and hurtful to the engine.

ESPECIALLY Bisi's N/A SOHC D15 12 second honda????

 
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yeah, you will notice gains, but dont expect HP to be much higher. They usually give you more response though.

 
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yea a properly installed system will not do any damage. But it will have increased wear on the engine. Same with a turbo, properly installed will be fine, but the car isnt made to accomidate for turbo and nitrous. there are alot of things you usually have to add to accomidate for it. After having them for a while and what not, you engine will wear faster.

 
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So your not in limp mode?