Would like to get suggestions for a muffler for an 98 Integra GSR running in STS.

As per the rules for STS, "Exhaust system downstream of CAT can be modified => Stock CAT cannot be changed". My plan is to have a final set up like DC 4-1 header + stock CAT + the new muffler.
Any recommendations on the muffler? I have decided to go doe a DC header because of performance-price considerations.

Also, its daily driven street car...so, to the extend possible I would like to get a decent sound (=> read not so loud)

Thanks ...so much

 

anyone?

 

SCCA D stock champ uses a magnaflow cat back...if it works for him.......

 

look on egay this is 180 with a 2.5in collector



then go to coastfab.com for the muffler

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stormy &raquo;</TD></TR><TR><TD CLASS="quote">look on egay this is 180 with a 2.5in collector



then go to coastfab.com for the muffler</TD></TR></TABLE>

Read the rule posted. Anything downpipe of the car is legal. This header thing is illegal in STS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by davidnyc &raquo;</TD></TR><TR><TD CLASS="quote"> This header thing is illegal in STS.</TD></TR></TABLE>

Nope. Headers legal. Cats cannot be changed... and must remain in the same location as OEM. I wouldnt buy a POS $180 ebay header though.

 

The way, I interpret the STS rule was that, as long as you keep the stock CAT, you can change anything on the exhaust system.

The above picture seems to be that of a JUN header. There is another JUN header in ebay for $245.....
http://cgi.ebay.com/ebaymotors...=WDVW

I thought JUN and DC headers are all relatively equal???

 

That's correct. STS champions have been using headers for years... just keep the stock cat, or even a OEM replacement cat.

 

can I expect any performance gains with just a magnaflow muffler replacing the existing muffler?

Any inputs on the sound of magnaflow muffler on the stock GSR set up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by stormy &raquo;</TD></TR><TR><TD CLASS="quote">look on egay this is 180 with a 2.5in collector



then go to coastfab.com for the muffler</TD></TR></TABLE>
i'd have to recommend against that header.i have some experience with the SSAC 4-2-1 header,where all the flanges are so warped/irregular that none of the connections seal-and i mean "sounds like it's running an open header" kind of leak.i'm sure they spend tons of money on R&D to tune it too.
if you're getting a header,spend some money for something nice and proven,otherwise leave it stock.
for exhaust,any 2.5" mandrel bent,straight thru system should be fine.on both my car i built the exhaust with mandrel bends,then finished them off with Magnaflow mufflers.nice,deep sound and not too loud.if you're handy at fabbing,or have a friend who is,this can save you a ton of money.if not,a system from any of the popular manufacturers will be fine.
Chris

 

I guess, a Magnaflow muffler with 2.25" inlet, Dual 3.25" x 2.5" ovals(part# 14830) should be fine to weld onto the stock GSR bpipe?? I think the stock GSR pipe to the exhaust is 2.09" or so
http://www.sportcompactonly.co...d=118

 

Vibrant Performance makes pretty good stuff too.

http://www.vibrantperformance.....html

I have a rear resonator on my Type R that is from them:





I have a Hytech header and custom 2.5" SS exhaust on my Type R with the Vibrant resonators. They sound really good too.

They also make 4-1 and 4-2-1 headers for B series Honda motors

http://www.vibrantperformance....7.pdf

 

do you mean just a muffler or a catback exhaust? A muffler will only make your car sound different it will net you no hp...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">I guess, a Magnaflow muffler with 2.25" inlet, Dual 3.25" x 2.5" ovals(part# 14830) should be fine to weld onto the stock GSR bpipe?? I think the stock GSR pipe to the exhaust is 2.09" or so
http://www.sportcompactonly.co...d=118</TD></TR></TABLE>
i'd recommend a single outlet muffler-a dual outlet may cause turbulence,but i have no info to support that i have #12216 on my hatch.oval,no tip,looks stock:
http://www.magnaflow.com/02pro...d=845

on my coupe i have #14840(with the tip cut off.hated the 5" tip,so i cut it off.hated that it's round too,but got a GREAT deal on it from a friend):
http://www.magnaflow.com/02pro...d=812

BTW-if you want Magnaflow,try this guy-it's where i bought the muffler for the hatch.best prices i've found.for instance,the #14830 you mentioned for $140,free shipping:
http://cgi.ebay.com/ebaymotors...33636

as said above,a full exhaust is the only way to really get the full benefit,especially if you plan on using a header too.otherwise,you're mostly just making more noise.
chris

 

As I said in my first post "Would like to get suggestions for a muffler for an 98 Integra GSR running in STS. As per the rules for STS, Exhaust system downstream of CAT can be modified =&gt; Stock CAT cannot be changed".

My plan is to have a final set up like DC 4-1 header + stock CAT + the new muffler?

So the question is des it make sense toi hac\ve a magnaflow muffler with a DC 4-1 header?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">My plan is to have a final set up like DC 4-1 header + stock CAT + the new muffler?

So the question is des it make sense toi hac\ve a magnaflow muffler with a DC 4-1 header?</TD></TR></TABLE>

Just the muffler? Thats not really worth any gain, you need to replace that small piping between the muffler and cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">As I said in my first post "Would like to get suggestions for a muffler for an 98 Integra GSR running in STS. As per the rules for STS, Exhaust system downstream of CAT can be modified =&gt; Stock CAT cannot be changed".

My plan is to have a final set up like DC 4-1 header + stock CAT + the new muffler?

So the question is des it make sense toi hac\ve a magnaflow muffler with a DC 4-1 header?</TD></TR></TABLE>
the Magnaflow muffler and DC header sound good,but i think you're missing the point.to get any real gain,and still stay within the rules,you need to replace everything but the cat.get a good header,and replace the whole exhaust system,from the flange that bolts to the cat to the muffler.the rules say nothing about having to keep the stock piping.the stock piping is too small and needs to go to get any real gain.
Chris

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris &raquo;</TD></TR><TR><TD CLASS="quote">
i have #12216 on my hatch.oval,no tip,looks stock:
http://www.magnaflow.com/02pro...d=845</TD></TR></TABLE>

same, gets my recommendation! sounds pretty good too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TeamNextGenChris &raquo;</TD></TR><TR><TD CLASS="quote">
the Magnaflow muffler and DC header sound good,but i think you're missing the point.to get any real gain,and still stay within the rules,you need to replace everything but the cat.get a good header,and replace the whole exhaust system,from the flange that bolts to the cat to the muffler.the rules say nothing about having to keep the stock piping.the stock piping is too small and needs to go to get any real gain.
Chris</TD></TR></TABLE>

So, I think these are the things I need

1 Muffler
2 Piping from stock CAT to the muffler . I know that stock GSR pipe size is around 2.09". Is it one piece pipe? what is this called?

Do I need anything else? Anything to connect from the DC 4-1 header to the stock CAT ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by schumi &raquo;</TD></TR><TR><TD CLASS="quote">So, I think these are the things I need

1 Muffler
2 Piping from stock CAT to the muffler . I know that stock GSR pipe size is around 2.09". Is it one piece pipe? what is this called?

Do I need anything else? Anything to connect from the DC 4-1 header to the stock CAT ?</TD></TR></TABLE>

You do not NEED to have a muffler at all in STS. If you are going for an all out autoX-only STS build, just use a straight dump pipe bolted on back of the stock cat. (IIRC, the exhaust must exit at some point behind where the driver sits) It will save considerable weight and free up some power.

Andrew

 

Its a daily street driven car I need to have a muffler

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by aklucsarits &raquo;</TD></TR><TR><TD CLASS="quote">You do not NEED to have a muffler at all in STS. If you are going for an all out autoX-only STS build, just use a straight dump pipe bolted on back of the stock cat. (IIRC, the exhaust must exit at some point behind where the driver sits) It will save considerable weight and free up some power.</TD></TR></TABLE>

In my opinion, the 1 hp (maybe) that you'd gain between no muffler and muffler is not worth the annoyance to your competitors not to mention the surrounding community (who can fight to kick you guys out).

 

Its a daily street driven car I need to have a muffler

So what all do I need?

1 Muffler
2 Piping from stock CAT to the muffler . I know that stock GSR pipe size is around 2.09". Is it one piece pipe? what is this called?

Do I need anything else? Anything to connect from the DC 4-1 header to the stock CAT ?

 

dude, just make it easy on yourself and order a off the shelf cat-back exhaust. if you want quiet, get an Apexi WS.

and I know STS champs have been using headers for years, but as you quoted the rules, a header is illegal. the header is not downstream of the cat. it is upstream. Are you quoting the rule incorrectly?

 

Header is legal in STS.

I was specifically talking about the exhaust system where rules are "Exhaust system downstream of CAT can be modified =&gt; Stock CAT cannot be changed"
Because of this, I cannot go for an off the shelf exhaust system. Not sure about the anything upstream of CAT in the exhaust system??