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Would this do anything to a 7th gen civic ex? Some people tell me that i will get better higih end torque. Is it worh getting?
And also...does out cars have the louvered exhaust core or the perforated exhaust core?

 
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No it really doesnt do anything performance wise. You will get minimal gains from it. Also depending on which exhaust you get, will depend on the sound. But if you choose to get custom piping, make sure you get mandrel bent piping.

 
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I got it done for like 80 bux damn good deal IMO...well worth it and I noticed the car become a bit more responsive to the gas and some increase in power.

 
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you got mandrel bent piping done for 80 bux?

 
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There is no way that is mandrel bent piping, has to be crushed piping. And $80 seems a bit cheap to have custom piping done.

 
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there is a place by my house where they will do it for 80 bux. i mite get it done for cheaper then that because i know the guy that owns the shop here! hehe

 
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$80 sounds like a shitty *** job to me. And I doubt it is mandrel bent piping. Dont get it unless it is.

 
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i got my piping done for $80 but it wasnt no mandrel bent...

 
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locations may vary. i live in nor cal and got charged $150-200 for straight pipe from cat to muffler while the so-cal ppl get the same work done for $120 or lesser.

but with 2.25" custom piping, it should give you, not really much, a small gain. im pretty sure your car would be more responsive. if their work is good for $80, i'd definately go for it.

if you want to notice some performance, consider a hi flow cat or no cat at all using a straight pipe. i have the megan hi flow test pipe/resonator www.meganracing.com on my ex and it was well worth 100bucks off eBay =D

 
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It was mandrel bent and the shop is monore NC, custom too

 
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actually depending on the shop.. its worth it.. ive compared my exhaust with the tanabe.. and it has way less bends in it...

 
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mine was 300 bucks, 2.5 inch mandrel bend magna flow exhaust and magnaflow tip. inlet 2.5 and outlet 2.5 and with a resonator and cat back. cat back 80 bucks sounds shady to me

 
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80 bux is pretty cheap but i know this guy and i know he does a damm good job with other people's cars. And yes he said he will get me mendral bent piping.
And i was reading a book about honda cars...they say that for our cars with d17a engine, it is best if we get mendral bent exact 2 inches custom exhaust piping. with exactly 2 inches we will get 95% of the hp we lost from our stock exhaust.

 
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I dont see how you got mandrel bent piping for $80 installed. I have good piping and it isnt mandrel bent and I paid about $150 installed.

 
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I have crush bent and it really has no difference from a friend that has the same muffler and mandrel bent. No performance or sound difference what so ever.Oh yeah my friend has an 03 vic. So yeah with our cars it really doesn't matter if it is crush or mandrel bent.

 
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Mine is crush bent, but I had a friend do it. He did a good job. Other people in his shop wanted him to redo theirs after they heard mine. Theirs sounded like bees, mine sounds throaty. Im happy, and I noticed some low end from mine?

 
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yes it does matter if you have mandrel bent piping. here is why.

Mandrel bends maintains the same ID all the way through the bends. Crush bends are just like they sound; the piping is crushed slightly while bending, decreasing the ID of the pipe.


A truly excellent exhaust can make a big difference to performance. You want to maintain velocity of the exhaust gases with as little restriction as possible. The reason is the scavenging effect on your engine. What this means is that with an excellent system, each exhaust pulse, as it races through the piping, leaves a slight vacuum behind it to help suck the exhaust out of the next cylinder when the exhaust valve opens. This helps make your engine more efficient. You want to pump in all of the air you can, and pump all of the exhaust out. This is especially important at high rpm, when things are happening more quickly.

Now, as you introduce restrictions to the exhaust, you begin to reduce the scavenging effect because you don't maintain the same velocity through the system. That is why mandrel bends are preferred.


Think of your exhaust system as freeway. The larger your exhaust system, the more lanes in the freeway for traffic (or exhaust) to travel. Now lets say your exhaust system is two lanes of a 4 lane freeway. With a mandrel-bent exhaust, you maintain both lanes as you go around a bend. With a crush-bent exhaust your freeway goes from 2 lanes on the straights to 1 lane on the bends. Not very good, eh? Both lanes of traffic have to squish into one to go around the bend. Traffic already has to slow down to go around the bend, but having to go down to one lane too slows it down further. This isn't much of a problem when traffic is light, but traffic is heavy (i.e. your foot is down on the throttle and rpms are up) things start to back up before you reach the bend. In this case, though, tempers don't flare and horns don't honk - you just lose performance.

Hint, you lose performance when you have crush bent piping.

 
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But notice I said on our cars with minimal gains from the exhuast with all you are getting is sound it doesn't really matter how it is bent. So you are telling me that me hearing the same thing from my crush bent system and my friend mandrel bent system, is wrong and I need to check my ears basically. Cause well I just had an ear flushing a couple weeks ago lol. But there was no performance or sound difference between us. We both have LX civics. his is 03 mine is 01 so there is no difference in the cars.

 
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I think you won't notice until you do a few more mods. Just an exhaust alone their may be little, if any, difference felt.

 
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how is mandrel bent pipe done im just curios cuz im thinking of getting a custom 3in pipe with HKS hi-power muffler for when i get my turbo and i dont want to get ripped off and its crushed

 
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Any place that sells 2" or 2.25" mandrel bend midpipe on internet? None for 2,000 miles around here.

 
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get megan racing hi flow cat
goto google.com and type in megan racing hi flow cat and u should find somethin for you car.

 
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Well, mine is crushed bent 2.25" pipe, and my car doesn't sound like a bee. Not too straight, but I can feel a performance gain.

 
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our cars have a perforated exhaust core, flowmaster and that sort have louvered.. just to answer your question...

 
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at least im pretty sure we do..

 
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thats in your head man, if you have crush bent piping, you are restricting flow, so most likely you are losing power.

 
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heh...thanx for answering my question man.

 
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but if you have a straight mandrel bent exhaust with the muffler as the ONLY restriction.. you will lose torque because there will be almost no back pressure

thats what the crush bent pipes will do for you

 
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Likely loss of low end torque (as reported by many on this site) is the main reason I haven't changed midpipe. Mostly stop & go, short spurt driving out here, so low end torque is important. HKS which designed most popular axle-back for our cars decided after testing that stock midpipe aint too bad. Then again, I've also added FIPK intake, Kamikaze header and a few other performance mods so what do ya'll think, upgrade?

 
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He didnt say mandrel bent though, he said crush bent. If you have crush bent piping, most likely you will lose power. Or you will stay at the same power.