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Discussion Starter #1 (Edited)
Since there seems to be a new general exhaust question
each week...i decided to put this thread together.
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While full after-market exhaust kits may be limited for our cars, there are plenty of
universal options (Both Greddy and Stillen use to make kits for the G20 but have
long ago discontinued production). Depending on how much $$$ your looking to
spend, what kind of setup your looking to achieve, and the look and tone of the
exhaust you want, it gets confusing choosing between brands, styles, piping, and
everything in-between.
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Budget Exhaust Options:
Like always, Ebay! By searching through Ebay motors under the title "Universal
Exhaust", your options will be nearly limitless. Find something that suits your style,
but keep in mind that you get what you pay for.

Popular "Decent" Ebay Brands: OBX and Apexi
These exhausts can be found for around $50 or more,
and offer a decent quality product that will sound good, and
have some longevity. Most of these exhausts will come with
removable/adjustable silencers to control the noise level of
your new rear section.

Other Cheap Exhausts: Summit or Thrash Turbo
These exhausts can be purchased for around $15, and will add
a slight performance tone in comparison to your stock muffler.
Both of these brands can be found at www.sumitracing.com
and will also need to be welded up.

Piping:
Your best bet here is to find a local muffler shop, and have
them fabricate some custom Mandrel Bent piping. Prices
can range between where you go, so shop around and be sure
they offer Mandrel Bends (more expensive than crush bends,
but does not rob your engine of HP). Unless you are Turbo, you
have no need to go above 2.5" piping, and remember, the smaller
your piping, the quieter your exhaust will be.​
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Deep Pocket Exhaust Options:
ALthough high quality exhausts can be found on Ebay, your chances
of finding anything better than an OBX or Apexi is slim. While your
still going to need a universal exhaust, there are 2 very popular
options among this forum.

Popular Quality Exhausts: Magnaflow and Remus
These exhausts are more expensive than the previous mentioned
ones, and usually start at a little over $100. Both these brands offer
high flow designs and a deep low growl. Your style options (especially
with Magnaflow) vary from dual and single tip, to the type of outlet
wall, angle, and length. Maganflow procducts can be found at
www.sumitracing.com / Remus products can be found at
www.remusexhaustshop.com

Piping:
Custom tubing is still a perfectly good choice, and most people will
go this route whether looking to spend a little, or a lot of $$$. Another
option is to purchase a piping kit made for our cars by VRS, but you will
still have to get your universal exhaust welded up.​
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Headers: An aftermarket header will give you the most bang for your buck
in terms of power gains. A header replaces your car's stock exhaust manifold, and
also your down pipe. Providing larger piping, a header improves the exhaust flow
from your engine, in tern improving performance. Gains to be expected can range
from 5-15 hp depending on which header you choose to purchase. Fortunately, this
is an aftermarket performance part that is easy to find for the SR20 community. SSAC,
OBX, Hotshot, Pacesetter, and Stillen are among the most popular brands used on
the SR20 engine. However, Hotshot, Pacesetter, and Stillen have discontinued
production of headers for our cars, leaving us with SSAC and OBX. Both of these
headers will cost you around $100, and can generally be found on ebay, with the
SSAC offering 2" & 2.5" piping, and OBX offering 2" piping. For these two headers,
gains to be expected is around 10 hp.
Note: Aftermarket headers are NOT emmision compliant, and may result in your car
failing emmisions. A header will also increase engine noise and vibration, as well as
increase exhaust noise if you are running an aftermarket rear-section.


Resonators: These are used to achieve a deeper, quieter, more desirable
tone from your after-market exhaust. the longer the resonator, the more
effect it will have on the tone of your exhaust. the most popular resonators
on this forum are with Magnaflow, where you'll choose your length, inlet/outlet
size. These are not completely necessary to achieve a nice tone, but do help.

Removing/Upgrading your Cat: The G20 was made with a very unrestrictive
Cat, so in most cases upgrading this part of the exhaust system is not necessary.
Unless you are Turbo, or hate mother nature, you have no reason for removing your
Cat and installing a Test Pipe. In-fact, this can be very harmful to an N/A vehicle, so
save yourself the time and money, and obnoxiously loud exhaust and leave it be!

This write-up by no means covers every aspect of exhaust systems.
Do some searching around, PM someone with an after-market exhaust,
or post if necessary to find out more. With that said here is an example
of a "Budget" exhaust job:
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These pics and vids are from my car. I have an OBX B9 exhaust, with a 2.5"
inlet, and 4" outlet. My piping is all custom mandrel bent. I spent $60 on the
exhaust, and $120 on the piping. I love my set up. No drone at highway speeds
(under 80 mph), a deep tone, and a nice growl at idle...

Here are two Video/Sound Clips of my exhaust:
http://s83.photobucket.com/albums/j308/ndhernan/?action=view&current=MVI_0427.flv

http://s83.photobucket.com/albums/j308/ndhernan/?action=view&current=MVI_0428.flv

Just some pics...






*Note: i know i probably missed some important info, or got some
stuff wrong in this write-up, so feel free to correct me or offer some
additions to the content :)
 

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LOL! I was going to start a thread asking about what type of resonator to go with. Either the standard baffle design or a magnaflow muffler type. You save me from starting the thread. Thanks! With that said, can anyone chime in on what they found to be the better choice? Also pros/cons between the two types - is better flow, gain/loss on HP, etc. Oh, and my goal is to find a true bolt-on, dual tip Remus muffler. For the P11's, the Remus part number is 606096-0502 (sorry, I don't know if they ever made a direct bolt-on for P10's). Currently they're going for over $550US +s/h on eBay...... Again, this is a muffler only. I'll have to upgrade the intermediate pipe between the Cat & muffler as well. Of course, that's where the resonator will be located....
 

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I was thinking of going double cat with the built in option to remove both and swap in one or two test pipes. What do you guys think of that option?
 

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p10 guru
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holy crap!! a remus muffler is $550. wow.. i used to want one
 

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550*L*..I'd rather keep mine stock and put 550 in a 75-100 nx kit with change to spare
 

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StangG20 said:
holy crap!! a remus muffler is $550. wow.. i used to want one
Ya just gotta know where to look and what to look for. I've spent almost $200 less then that for 2 of em. Being that people are typically getting new piping when buying a Remus a universal muffler works well. The first one I got as a single tip universal and the dual tip thats in the mail is for a 200sx. I went with no resonator and 2.25" piping and it sounds great. Lou, you may wanna re-think the resonator, you may not need it. When I get the SSAC header installed and the dual tip I'll know for sure if I need it or not. If so it's not much $$$ for my exaust guy to add it in.
 

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Discussion Starter #10
yea i was going for the FAQ/Sticky thing, I
thought we could use one in this category.

although this hasn't gotten as much attention as i thought
it would... oh well, as long as its helpin out a couple of us
 

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CH0DEmobile
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I was going to spend the $$$ to get a magnaflow, but after hearing nj's exhaust, I'll just grab an OBX B9 and a 2.5" VRS kit. It doesn't sound ricey at all. The local exhaust shop I use is awesome, but they can't/won't mandrel bend anything under 3" The only thing that worries me is adding in some headers and changing the sound. I know it's different car-to-car, but on my friend's celica with a 4AGE swap, it sounded awesome with a cat-back, but after he put some headers on it, it sounded like a ricemobile (and still does). His piping is crush bent, though.

njprimera- are you running a resonator?
 

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Discussion Starter #13
bhowle said:
I was going to spend the $$$ to get a magnaflow, but after hearing nj's exhaust, I'll just grab an OBX B9 and a 2.5" VRS kit. It doesn't sound ricey at all. The local exhaust shop I use is awesome, but they can't/won't mandrel bend anything under 3" The only thing that worries me is adding in some headers and changing the sound. I know it's different car-to-car, but on my friend's celica with a 4AGE swap, it sounded awesome with a cat-back, but after he put some headers on it, it sounded like a ricemobile (and still does). His piping is crush bent, though.

njprimera- are you running a resonator?
i had the guys who did my piping leave the stock resonator,
and didnt bother upgrading to a magnaflow. so technically its
just the piping and rear section.

if your gonna do headers though...your exhaust will get much louder,
especially with an OBX and no resonator. i would suggest at least adding a
bigger resonator than stock if your lookin to put headers on. thats the only
thing holding me back on headers at the moment
 

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CH0DEmobile
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njprimera said:
i had the guys who did my piping leave the stock resonator,
and didnt bother upgrading to a magnaflow. so technically its
just the piping and rear section.

if your gonna do headers though...your exhaust will get much louder,
especially with an OBX and no resonator. i would suggest at least adding a
bigger resonator than stock if your lookin to put headers on. thats the only
thing holding me back on headers at the moment
Hrm, I guess I'll have to pick up a 2.5" resonator as well.
 

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Dude, your bed is a car..
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This is all GREAT information. thanks a lot... :banana:
 

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i missed this thread earlier this month, but i thought i'd chime in. i am running a t25 turbo with a magnaflow dual tip muffler and 3" mandrel bent piping. while the exhaust has a nice tone to it, i find it to be too loud, especially for latenight trips to the store. so, i decided to pick up a magnaflow resonator, and found one on a local forum for $60. i'll let you guys know how i feel about the difference after i have it installed this weekend
 

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Great info NJ........This needs to be a sticky...what would we do without g20.net? :smile:
 

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Great thread NJP....I do have a question about leaving the stock cat....well the pipe from the stock G20 is smaller then 2.25....so if u do decide to upgrade and get headers and a exhaust system with a resonator because of the headers.....I dont see Y you would want to leave the stock cat....if anyone decides to do 2.25 or 2.50 pipes the cat pipe will be smaller...now if you would replace the cat for a highflow one and the same pipe size as ur performance exahust setup then thats different.....does anyone agree with me on that ...
 

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I have heard that at least the inlet on the cat is 2.5". I am not sure about the outlet, but I don't see why they would build a restriction into the cat that would induce turbulence and backpressure by making the outlet smaller than the inlet.
 
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