Custom Exhaust or Greddy...?

what do you think would be better? getting a dual dtm exhaust with custom 2 1/4 inch piping or just get a Greddy MX? would i gain more hp with the Greddy? the greddy is pretty expensive and i want to know if i will see the difference between the greddy and custom. :confused:

A muffler shop cannot make the same quality piping that you would get with the Greddy cat back.


At least judging by the P11 setup I have from them. I havent seen a better cat back system.


But I'm not sure if the MX (for the P10) gets the same quality as the newer EVO line (for the P11)

Dunno how it is with other countries but I have always had my
exhaust systems done by exhaust shops. Greddy is just a name
any exhaust guy with experience can make you a good system.
Just go for a stainless muffler with good flow and aluminised/painted
mild steel tubing. Go mandrel bent if you want better flow but
the restriction is minimal. I agree that sometimes it is easier and
prettier to buy a system from Greddy due to the amount of idiots
that butcher exhaust jobs but I know a few people that I trust to
do it for me.
Custom mandrel bent piping is just as good as Greddy it depends
who does it though.

Originally posted by b-b00gie
A muffler shop cannot make the same quality piping that you would get with the Greddy cat back.

That depends. If you can find someone who does mandrel bends they can. That is pretty rare though and takes a lot of digging. Even then you might not find someone.

Certainly a crush bent exhaust (what 99.9% of muffler shops do) is not as good as the GReddy.

I'm not speaking only of the bending technique


The quality of the finish (at least on the newer Greddy systems; I have the EVO) is top notch.


It looks thicker and has a beautiful textured ceramic coating which appears as if it will NEVER rust or rot.

I cannot say the same for "home made" mandrel bent piping which usually lasts only a few months before it looks gross :(


Anyone who has the EVO system can back me up I'm sure...


Again.. I cant speak for the MX piping for the P10 as I have never seen it first hand..



I wish this picture was more close up (please note the P11 system is only 2 pieces not 3)

mandrel bends and crush bends arent that much apart are they? i mean the crush bends cant restrict that much air. it wouldnt lose hp would it?

Originally posted by AznVirus
mandrel bends and crush bends arent that much apart are they? i mean the crush bends cant restrict that much air. it wouldnt lose hp would it?

Yes, it would.

Originally posted by b-b00gie


Yes, it would.

how much hp difference do you think it would be between mandrel and crush bends? im not taking my car to the track or anything, just for street and maybe show later on. would it even be noticeable when driving?

I have the MX, it's the same quality as all GReddy exhausts, top notch. Don't get a crush bent exhaust, ESPECIALLY if you want to go show. It doesn't matter if you're going to the track. A quality exhaust and piping is a must even on the open roads. You're exposing the pipes to the forces of nature. Why not buy the more expensive GReddy now and not have to worry, instead of replacing sections of rotted/rusted pipe. Yeah, it's a little pricey, but from first hand experience, it's well worth it. The best thing about the GReddy is that it doesn't make the G20 sound like a raspy Honda. It has a lower rumble and isn't offending at all. The reason I bought the GReddy is because it is a very high quality exhaust and it's quiter than most exhausts. I mean really, a classy G20 with a loud popping exhaust note doesn't look/sound right.

The problem I've had with custom exhausts is that it's kind of a generic setup. They put you up with a universal muffler and mimic the piping to the back. My custom setup cost close to $500CDN for the initial setup. It ended up being too loud so I went back and had a resonator put in and the rest of the piping matched up. $250. That's almost $750CDN for my exhaust setup. The Greddy is $550US and take the exhange and it's only a couple hundred more than what I've got done. If the Greddy would have been available a couple years ago that's what I'd have gotten. As it stands I still got my eye on that damn Greddy. :) Ugh, job first, exhaust second. :hehe: :hehehe:

Originally posted by G-Forces
As it stands I still got my eye on that damn Greddy. :) Ugh, job first, exhaust second. :hehe: :hehehe:

*EDIT*
Ugh, job first, Brian's Impul kit second, Brian's Nismo grill third, exhaust fourth. :hehe: :hehehe:
*EDIT*

everyone quit doing everything and get the damn EVOs from me...hehe...still have 6 left....i dont wanna see it!!!! hehehe

with crush bent pipes the restriction is very minimal, like you
wouldn't even notice and who cares what it looks like underneath.
As for rust, that is why you paint it, I don't really care what mine
looks like and my car doesn't get exposed to road salt here.
My Skyline had custom headers and crush bent exhaust with 2 coby
mufflers and it was an awesome job, it was painted black with a
nice stainless tip and it was a very good job $600 NZ dollars I think
thats less than $200 US. It did not rust at all and the mufflers were
sweet as, kinda loud, ok very loud, ok so loud cops used to follow
me back home but it sounded good.

I guess what I'm saying is I personnally don't like pre-made systems
I think they are massively overpriced and don't sound that good
anyway. I know people that have paid way to much and not got
quality they thought they were getting.

Anyone know anything about the 5Zigen Fireball Catback System for the P10 besides that it's damn expensive? I saw it listed for $552.50 at http://autocarparts.com/search/results.php3?make=27&model=236&trim=354&cat=Exhaust

Top companies (i.e. GReddy) don't just foolishly make exhausts. There's actual R&D involved. With a crush bent exhaust, you never know what you're gonna get. There are only a handful of people out there that could replicate a custom exhaust with consistency. Some people don't realize that on a stock car, a GReddy isn't going to give you a whole lot of power. As you continue to add parts to your car that compliment the aftermarket exhaust, the more effective it becomes. This is where crush bent pipe (painted or not) starts to be ineffective and the mandrel bent ceramic coated pipes will continue to perform. Yes, you can paint cruch bent pipes, but the pipe can also rot inside out. Like many people have said, their custom exhaust is loud. Some try to remidy this, some don't, but like someone said, they get followed by cops. GReddy is 50 state legal. I have better things to do than watch my back every single time I want drive hard, or at all for that matter. As for 5Zigen Fireball, they look cool, but realize it will deminish your low end power. Super straight through exhausts like the Fireball and N1 are made to make power at peak. Those kinda exhausts will work good with a set of bumpsticks, but don't be disappointed that your city driving sucks. If you drive on the freeway most of the time they're good.

I kind of hate to contribute to a holy war here..... :jump:

First off, are you sure the GReddy is ceramic coated? They never used to be. Many folks on the SE-R list have had GReddys rust out.

Second, I seriously doubt they do much R&D. They make only so many cans and they find one that fits and bend up some pipes to use it on an application.

That said, I have a GReddy on my SE-R and really like it.

I cannot believe there is this much argument over exhaust, which for a NA engine doesn't free up enough hp to argue about with a SR20DE. Turbo is another issue altogether.

Yes I'm sure, I do own one lol...

As for the R&D... they do as much as any other company, which is... they have about 6 types of exhausts, they test each one on a car and which ever one performed best they will sell for that car..

..

Damn, people swear I don't know what I'm talkin' about, thanks b-00gie. NA or turbo, it's still better to go with an aftermarket exhaust (cat-back).

I agree with P10DET on the fact that it doesn't make much difference at all
as our engine is only 122 Cubic inches. I think if you upped the compression
or went turbo then a higher flow exhaust system could make a difference.
Are you a little bias towards Greddy boogie?:p (is Greddy American?)
I think trust/hks and many other manufacturers including custom exhausts
are just as good but I do like that ceramic coating they use. Is it similar to
HPC?

Sorry Niska I didn't read your reply. My old exhaust in my skyline was intentionally
that loud, I really liked it like that, it used to pop flames and do cool backfires:D
( there are different laws on noise and pollution here).
The agree more mods you do to your vehicle the more you need a high flow system
but the exhaust I have on my G20 is a combination of high flow mufflers and
mandrel bends, I paid bugger all to have it done and I am more than happy with
it but again it was done properly. I know a guy who paid about $2200 Nz for a
turbo back trust exhaust system which I know could be replicated by Al's Mufflers
for less than a grand in stainless with mandrel bent pipe and they let you select the
mufflers to customise the sound you want. I don't want to annoy anyone with my
opinion but I can see that there are differences in laws and quality of custom
exhausts (ie finding someone good) that you can have done in other countries.
To me $500 american is like over $1500 Nz to me as a student I earn $160 a week
that pays for gas and alcohol on weekends, that is a lot of money to me to pay!!:eek:
Also as I used to sell car parts I know how much they make on making exhausts
cos it ain't that hard and pipes/mufflers are cheap.

I don't know how it is anywhere else, so I could be totally off compared to anyone elses area. But in Washington state, the muffler shops are filled with kids tryin' to earn a buck who really don't give a rats ass about you or your car. The owners are old, SERIOUSLY prejudice (automotive wise), hairy a-holes. They believe there's nothing better on this earth than their hot rod. They treat imports like the plague, so obviously the quality is crap. This is what I'm comparing the GReddy too. I guess you can see why I favor aftermarket more.

Originally posted by b-b00gie
Yes I'm sure, I do own one lol...

I own a GReddy as well and it looks just like yours (the pipes anyway). Mine's just silver paint. The GReddy web site doesn't say anything about ceramic coating.

Where did you read that it's ceramic coated?

Originally posted by P10DET


I own a GReddy as well and it looks just like yours (the pipes anyway). Mine's just silver paint. The GReddy web site doesn't say anything about ceramic coating.

Where did you read that it's ceramic coated?


Must not look just like mine then... cause mine is not paint! its coated.. and not smooth like a plain jane pipe.. nor is it painted over...

Originally posted by G20-KIWI
Are you a little bias towards Greddy boogie?:p (is Greddy American?)



Nope. The only thing I'm baised on is that I will take a real cat-back system over a muffler shop rigged one anyday.



Originally posted by G20-KIWI
...I think trust/hks and many other manufacturers including custom exhausts are just as good but I do like that ceramic coating they use.


LOL... Trust = Greddy !!! :right:

Ok well I did not know that, enough alreddy.LOL

And to continue, the guys who I use for my exhausts and my mates
(including their race cars) are fricken legends, so I'd rather have
a custom exhaust from them:p

I took a while to find these guys but because NZ is basically all
Japanese imports most exhaust shops specialise in them.

When I worked at a car parts place in west auckland every "Westie"
(the same as the american term "rednecks") used to come into my
work and bleet on about how they are restoring a "mean as" FORD
or Holden (GM) and how jappas suck, funny though cos every
single westie owns a jappa to get around because they will NEVER
ever manage to finish their V8's. I don't like them myself but I used
to get them started on how Rotaries are better than V8's hehehe
:devil:

Originally posted by P10DET


I own a GReddy as well and it looks just like yours (the pipes anyway). Mine's just silver paint. The GReddy web site doesn't say anything about ceramic coating.

Where did you read that it's ceramic coated?


I don't believe the Greddy exhausts are ceramic coated, i have yet to see one that is. However, would that help with exhaust gas flow? HPC is right around the corner from my parents house (about an hour and a half from me now), but i could just drop the parts off there to get coated before i install them (as a cheap alternative to Swain, too bad they are not closer). Any ideas? and would that help on a Gen 3 hs header too, I'm guessing just for underhood temps?
Finally, do you have pictures of your greddy? im guessing they'd be on your website? Thanks

Ceramic coating insulates tubes and at the same time is a very effective barrier from the forces of nature. By insulating a header with ceramic, the gases stay hotter, thus improving exhaust flow. In some cases scavenging is improved as well. It doesn't stain like stainless and if properly coated, won't corrode for a long, long time.

i.e.- The Stillen header on my wife's '91 P10 is going on 3 years without a blemish. Ceramic coated.

Originally posted by JustinP10


I don't believe the Greddy exhausts are ceramic coated, i have yet to see one that is

The Evo system for my P11 is coated, end of debate. All the piping is coated to the exhaust, over all the welds.. everything.

This is not paint.. you can scratch paint off.. this you cannot!


If anyone continues to doubt this.. buy one and prove it to yourself.


Maybe the older systems (ie those that came out for sentras and p10's years ago) are not.. but the Evo is a new line.

My MX for my P10 is, so that ends that all around.:silly2:

OK, I'm a dumbass :D I do know the one I saw wasn't coated, but I don't know how long ago it was purchased... It may have been under different circumstances, or just one of the earlier models that didn't have ceramic coating, or something like that. It's nice to know the new ones do have it though. My HS header has the ceramic coating on it, and it's held up nicely (except where i scratched it doing the multiple installs) :mad: . I'd be curious to see how much a better coating would help though, cause I believe my HS header (gen 3) is only coated on teh outside, where i think the new gen 4's are coated on the inside too? Anyone have a Gen 4 and care to comment?

I have a Gen. 4 but never bothered to look inside and check for coating. As long as it's on the outside, and I have it buttoned up tight, it's all good.

the exhuast is ceramic coated i just got mine installed last night its all top notch stuff everything lineind up perfect and its defintly not painted
sleepy:devil: