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Old 01-07-2011, 08:25 PM
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Icon11 Exhaust Piping

ok so i got a riced out prelude and fell in love with them... lol so i wanna do some work to the car. First off is removing the loose butt hole of a muffler, so i bought a magnaflow, yay. i also bought another resonator and a test pipe. test pipe exit is 2.5in so im going to re-pipe the whole exhaust, but i dont know what pieces to get, aka 90 deg elbows and straights such. so if anyone has any info that would be great... that way i dont have to crawl under my car... thanks!

ph and duh, forgot to post its a 96 VTEC
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Old 01-07-2011, 11:30 PM
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Re: Exhaust Piping

2.5 is weak, go 3 (75mm), hytech replica header, mendrel piping, no cat, single resonator, apexi n1 75mm turbo muffler.

More gain then 2.5, and will sound deep.

Juuuuust my opinion, if redoing your whole exhaust is an option.

But as for piping, your best bet would be to go to an exhaust shop, leave the car for a day and let them match the old piping with new 2.5 piping, they'll weld it and you'll be set. Cheap too.
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Old 01-08-2011, 10:05 AM
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Re: Exhaust Piping

As stated above, you will see better gains with a 3" exhaust. I personally wouldnt go with a test pipe but thats what it isnt my car also.

An exhaust shop can get it done as terror stated. Or you can also go to kteller.com and they have pre bent exhaust piping running the oem route of your car in many sizes. Including 2". 2.5" and 3"
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Old 01-08-2011, 10:33 AM
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Re: Exhaust Piping

ok, i only ask because i have access to a shop next week, but maybe ill go to a muffler shop and see what they can quote me for the tubing then put the muffler & pipe on next week, thanks!

EDIT: just a side note, since i already bought the muffler with 2.5 i/o, it would be useless to go with three inch tubing correct?

Last edited by jizmloaf; 01-08-2011 at 10:38 AM.
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Old 01-08-2011, 11:34 AM
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Re: Exhaust Piping

Im pretty sure it would be. Dont quote me on that tho. 2.5 inch isnt really that bad tho honestly. Its not like its totally worthless. I mean, Im pretty sure ogsmakdade is using a 2.5" exhaust and hes making 250whp all motor.
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Old 01-08-2011, 11:49 AM
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Re: Exhaust Piping

2.5 is perfectly fine for N/A. 3 is overkill unless you're going turbo.
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Old 01-08-2011, 11:53 AM
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Re: Exhaust Piping

Yea don't go 3in unless your whole system is 3in, even the collector on the header (having mine modifed). You'll be good with 2.5. 3in would be something to shoot for of you're redoing your whole system like myself.

Why wouldn't you use a test pipe though? Any benifits to cats?
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Old 01-08-2011, 11:55 AM
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Re: Exhaust Piping

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Originally Posted by RandallSharp View Post
2.5 is perfectly fine for N/A. 3 is overkill unless you're going turbo.
Nope. 3in is the most gain, na or boost. Untuned 3in out performs tuned 2.5. A dyno is floatig around somewhere.
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Old 01-08-2011, 12:00 PM
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Re: Exhaust Piping

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Originally Posted by Terror View Post
Nope. 3in is the most gain, na or boost. Untuned 3in out performs tuned 2.5. A dyno is floatig around somewhere.
3" is definitely overkill. He's not looking to make a hp monster or he would have said so. He's fine with what he has.
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Old 01-08-2011, 12:12 PM
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Re: Exhaust Piping

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Originally Posted by Terror View Post
.
Why wouldn't you use a test pipe though? Any benifits to cats?
Well one is because I have emissions here. Also because the census is that it makes your car stink, normally sound raspy and doesnt really net u any gain over a high flow cat. Maybe like 1hp or something. But everybody has personal opinions on that subject. Thats just mine

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Originally Posted by Terror View Post
Nope. 3in is the most gain, na or boost. Untuned 3in out performs tuned 2.5. A dyno is floatig around somewhere.
This is true. 3in untuned outperforms 2.5in tuned.

Read this. It will take a minute to load up, but it will load up
http://bbmoto.net/wiki/index.php?ExhaustTheory
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Old 01-08-2011, 12:15 PM
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Re: Exhaust Piping

Edit: Nvm

Last edited by blackbb6; 01-08-2011 at 12:48 PM.
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Old 01-08-2011, 12:48 PM
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Re: Exhaust Piping

OVERKILL! He would have to go out and spend much more money when 2.5 is just perfect. 3" exhaust on an unmodified car is pointless. It may have gains, but it's not worth it for someone just wanting to rid of a fart can. A 3" exhaust will just be louder and more annoying AKA ****ING RICE
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Old 01-08-2011, 01:22 PM
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Re: Exhaust Piping

Hah relax man, just a discussion. Gain is gain i'll, if your going to do it, do it right the first time. 3in is turbo ready, so at anytime down the line he decides to go boost he wont have to redo the exhaust. For the more breathing room, and viable option for boost later, imo, 3in is best. As for price it MIGHT be 50 dollars more, about it. For means of just tightening your exhaust man 2.5 is fine. Im just a perfectionist.

But overkill isn't the right word. Unnessesary for practical use, ya.
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Old 01-08-2011, 01:40 PM
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Re: Exhaust Piping

word....im redoing my exhaust soon i will be going 3 in all custom...

2.5 is good and if its what he already bought and tryn to stick to a budget yea.....but honestly if 3in makes more power who in there right mind wouldnt want that....

overkill is def not the right word.... and nothing rice about a 3in custom exhaust
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Old 01-08-2011, 01:42 PM
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Re: Exhaust Piping

Quote:
Originally Posted by RandallSharp View Post
OVERKILL! He would have to go out and spend much more money when 2.5 is just perfect. 3" exhaust on an unmodified car is pointless. It may have gains, but it's not worth it for someone just wanting to rid of a fart can. A 3" exhaust will just be louder and more annoying AKA ****ING RICE
How do you figure? 3" posts better gains then 2.5 and for just a bit more money can be had. As far as being overkill and rice those are your opinions but if you polled the majority of the Preludezone my money would be most would vote for the 3" size. I wouldn't call anything overkill that let my engine breath easier and run better with more power. Last time I checked smaller diameter piping = less airflow making it harder for the car to breath, although 2.5 has been used forever with great success-I'm just sayin...If you don't like 3" that's fine but it is the better alternative.
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Old 01-08-2011, 02:00 PM
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Re: Exhaust Piping

A full exhaust upgrade will run about a grand, just for those interested.
Hyech replica header - $450
3in mendrel bent piping (stainless steel) - $270
Name brand muffler (apexi turbo spec 75mm) - $200
Installation for modification of header collector from 2.5 to 3 - $200 local shop
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Old 01-08-2011, 02:27 PM
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Re: Exhaust Piping

Quote:
Originally Posted by RandallSharp View Post
OVERKILL! He would have to go out and spend much more money when 2.5 is just perfect. 3" exhaust on an unmodified car is pointless. It may have gains, but it's not worth it for someone just wanting to rid of a fart can. A 3" exhaust will just be louder and more annoying AKA ****ING RICE
It wont be louder. Thats why u get a resonator. Heck maybe even two. A 3" exhaust can be just as quiet as a 2.5" easily. And I dont see how you saying something that shows gains is pointless. Thats like saying buying a hytech header or a euro r im isnt worth it. I wouldnt say a 3" exhaust is rice if its done right. But I would say that a body kit is rice.....ha.
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Old 01-08-2011, 05:25 PM
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Re: Exhaust Piping

yeah i agree that 3" isnt overkill but this motor will most likely stay n/a. as for the turbo, a friend and i are building up a d16 in the back right now. this is just my daily driver so the raspyness got to my head and ive always loved magnas. so ill just stick to 2.5 with resonator seeing that i am on a budget do to college... but that still dosnt stop me from ****ting on civics :D

also i only chose the test pipe because i paid 25 bucks shipped, its bolt on and stainless with resonator to quiet it down. we dont have emissions here in ohio but i would go hi flow cat if i had the bucks.
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Old 01-08-2011, 07:06 PM
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Re: Exhaust Piping

Quote:
Originally Posted by RandallSharp View Post
2.5 is perfectly fine for N/A. 3 is overkill unless you're going turbo.
no

Quote:
Originally Posted by Terror View Post
Yea don't go 3in unless your whole system is 3in, even the collector on the header (having mine modifed). You'll be good with 2.5. 3in would be something to shoot for of you're redoing your whole system like myself.

Why wouldn't you use a test pipe though? Any benifits to cats?
In the ball park

Quote:
Originally Posted by RandallSharp View Post
3" is definitely overkill. He's not looking to make a hp monster or he would have said so. He's fine with what he has.
no

Quote:
Originally Posted by RandallSharp View Post
OVERKILL! He would have to go out and spend much more money when 2.5 is just perfect. 3" exhaust on an unmodified car is pointless. It may have gains, but it's not worth it for someone just wanting to rid of a fart can. A 3" exhaust will just be louder and more annoying AKA ****ING RICE
Your saying my old lude is rice? Lots of cars use 3". And if your smart the extra $50-$100 is actually BETTER then the 2.5".

Logic is a better sense here...More Compression engine lets say o idk...H22, More Air being forced in and out..Out of a restricted 2.5" limits its breathing...3" it breathes easier..hense that extra 1-5 extra ponies.

When you say something that comes down to facts...use them..opinions can effect a persons decision and thats hard earned money.
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Old 01-08-2011, 08:16 PM
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Re: Exhaust Piping

so i looked at that link to the comparison between 2.5 vs. 3"......its only a 1 horsepower gain...

so IMO 2.5 is just fine, he already bought it too.
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