Dyno Don

iTrader: (7)

If you need a 3" catback for a third gen here are the numbers


WLK-43243 TAIL PIPE
$31.97
WLK-43244 TAIL PIPE
$31.97
WLK-53061 INTERMEDIATE PIPE
$63.97
WLK-54064 INTERMEDIATE PIPE
$46.97

AutoRoc

iTrader: (1)

Thanks a lot! I'm ready to go over the axle again...too many fumes at cruising speed..

drdave88

iTrader: (3)

The tailpipes are 2.5". I know most catbacks that say 3" still have 2.5" tails, but isn't there anywhere to get 3" tailpipes?

Nevermind, upon further inspection, it looks like all mufflers have 2.5" outlets anyway, so it really doesn't matter.

paul_huryk

Don,

Correct me if I'm wrong, but Walker 3" cat backs neck down to 2.5" right as they enter the muffler - I had one on my GTA when I bought it. Replaced it with a Magnaflow.

Dyno Don

iTrader: (7)

Paul:
I'm not sure on that but it is easy to cut it back to where it is 3" the 2 1/2 is only right at the end.

Ron U.S.M.C.

The Flowmaster American Thunder CAT back is a true 3in. including the exit/tail pipes.
I have one but cut the tips back.
= http://www.summitracing.com/parts/fl...t/model/camaro
and stainless =
= http://www.summitracing.com/parts/fl...t/model/camaro

Dyno Don

iTrader: (7)

That muffler sucks, I lost 30 rear wheel HP. VS. the Magnaflow.

Ron U.S.M.C.

I totally respect your wisdom in this matter.
That being said ...

WOW,
That really does suck.
Does that mean a stock 170 hp car is now a 140 hp car or a stock 260 hp car will lose 30 hp and that would be true of the thousands of cars running them ?
Does that mean a Magnaflow will free up 30 hp on a stock car ?
Just want to know because I really think that CAT back not only sounds good on my car but at least freed up some hp.

Dyno Don

iTrader: (7)

No, that is only one instance.
It would depend on the volume of exhaust your setup is putting out.
I have seen as much as 50HP loss on an engine dyno with Flowmasters.
They were great before anyone else was making better flowing stuff, but those days have gone by the wayside.
In the end there are better mufflers now.

Ron U.S.M.C.

Since my car is a DD and I don't race it than I’m ok with just knowing that I’m not loosing hp as compared to stock.

I also live in CA so have chosen to keep the stock manifolds and Y pipe. I did replace the stock CAT with a Magnaflow
and what I thought at the time was a nice flowing 3in. system.

All in all it’s the sound of the Flowmaster on my car I like as opposed to the others I’ve heard.

Most of what I’ve chosen to do is most likely not the most popular wrought but works for me.

Just the way I’ve chosen to set up the way my car looks is not the most popular.

89mulletbird

iTrader: (4)

Thanks to Don for this. I bought all these parts and a Mangaflow muffler, everything came to $310. I'll confirm the over the axle piece is 3" all the way, I have it in my garage.

The Magnaflow muffler MPE-12267 is wide open and doesn't look to restrict AT ALL. Don is 100% correct on his muffler choice.

I made a sketch of how the muffler looks internally. It tries to balance the length of internal pipe to each outlet.

Ghettobird52

Hey Ron, Don was probably talking about a car with over 350-400+ HP. That cat back is a great cat back, im going to be ordering one myself. Im particularly getting it because its the "best sounding loud" to me. I want to hear that interior resonance and love hearing my cam at idle (not stock).

Ghettobird52

looks sweet. I just hate how magnaflow is so damn quiet at idle. me no likey

89mulletbird

iTrader: (4)

It's probably quiet because it isn't restrictive I love flowmaster sound, I've had it on almost every 3rd gen I've owned. I may even buy one for my car to use and swap the Magnaflow in for track days

I remember when I was a kid, I put metal plates a few inches behind the outlets of my exhaust pipes on my motorcycle to make it louder (and more backpressure). I think flowmaster is similar to this concept... but again I love the sound of them.

89mulletbird

iTrader: (4)

LOL.....

I cut the hangar off the mid pipe thinking I would have to move that one. Well, that hangar seems correct. The one that needs moving is the hangar on the driver side tailpipe!

Ozz1967

iTrader: (4)

Is this essentially the same as this kit?

Magnaflow SS

MY87LT

iTrader: (2)

Well at least it's a two piece intermediate pipe instead of some that I have seen that are three.

Joe Tag

iTrader: (4)

Fitment says for 4th gen, I was under the impression the exhaust was different.

86T/A_Ram_Air

Just hanger position. Which can be fixed

89mulletbird

iTrader: (4)

I just installed the Dynomax/Walker 3" catback system and used a Mangaflow muffler.

BEWARE - don't cut off the hanger on the intermediate pipe before you test fit it. I ended up welding that one back on in the exact same place. The hangar that I had to redo was the hanger on the drivers side tail pipe.

The hanger that comes on the drivers side tailpipe comes off the side of the tailpipe and then up. The hanger SHOULD be directly above the tailpipe. I ended up cutting the hanger bracket off my stock tailpipe and putting it on the new tailpipe.

89mulletbird

iTrader: (4)

Ozz1967 - yes to your question. I was just reproducing that kit for $200 less. You can buy just the Magnaflow muffler and use it with the Dynomax/Walker parts.

PATRIOTIC1911

iTrader: (2)

I just installed a Flowmaster series 80 muffler with custom true 3" piping (not a kit), from the cat back to the muffler and tucked 3" tails. Now, correct me if I'm wrong, but this thread sounds to be saying that Flowmaster mufflers cause you to loose HP? I haven't noticed any lack. If anything the HP feels stronger...

Dyno Don

iTrader: (7)

Funny how noise is deceiving ...LOL

Ron U.S.M.C.

As compared to stock I don't believe I lost HP either.
(I don't have any true evidence to support that though)
And I love the way mine sounds and that makes all the difference in the world to me.

PATRIOTIC1911

iTrader: (2)

Ya, I LOVE the way my car sounds now. As far as I'm concerned it's the perfect tone/sound. My 305 tbi has been rebuilt, but rebuilt to stock specs.

Ozz1967

iTrader: (4)

I don't suppose you know which those are in stainless?

Ozz1967

iTrader: (4)

I think that'll be the plan, to buy the parts separately as it'll be cheaper.

Dyno Don

iTrader: (7)

They are not stainless, they are aluminized.

Ozz1967

iTrader: (4)

My apologies, I didn't phrase the question well.

Do you also know which ones, in stainless, make up the set needed for our exhaust?

89mulletbird

iTrader: (4)

Your best bet for stainless is to buy the Magnaflow cat back kit, it's around $520. You really don't NEED stainless unless you live somewhere they salt the roads in the winter.

Ozz1967

iTrader: (4)

Like Utah? Also looking at a possible move to Minnesota late next year.

PATRIOTIC1911

iTrader: (2)

I live in Minnesota, and your not going to want to drive your car in the winter here. Sure, with snow tires you can manage fine, but the winter salt will eat your car up.

89mulletbird

iTrader: (4)

If you have the extra $200 get the Magnaflow kit. If you don't have the extra $200 and you have a welder, get the pieces and a Magnaflow muffler and have fun putting it together

I H8 WWD

iTrader: (5)

WOW, I remember buying my #16829 Magnaflow from Summit for $320? matching from banditexhausts.com. I think that started the uprise of the exhaust price. After that, I've noticed it's never gone back down. Now I see it's up to over $500 and now $535 where I originally matched the price to Summit from. I love my 16829. Quiet at idle and somewhat at cruise, but any bit of romping on the gas, and it opens it's mouth completely. Exactly what I was going for. Fitment was crooked staring at the exhaust tips, but I hear that's common.

Ozz1967

iTrader: (4)

Thanks! I know Zilch about welding, so I think I'll wind up going with the Magnaflow kit. I can do the primary install on it and and have a local shop do some turn-downs for me for the tips to hide them after-the-fact.

vdoggie

I found exactly what you did from someone local and dropped the cat, had the pipe extended with the same exact muffler except the tails are 2.5 and not only did I notice but my wife was like, "wow this car is a LOT more responsive and faster" The funny thing is, it's her freaking car!! HAHAHAHA I love that 80 series sound.. such a killer deep rumble at idle and when you step on it, it's not crazy loud like the 40 series.. my wife would have made me put back on the stock muffler.. that thing was waaaay too quiet.

89mulletbird

iTrader: (4)

I think Don was referring to 400+ HP cars may lose power with a Flowmaster vs a higher flowing muffler. On a stock vehicle, I doubt the Flowmaster is holding you back any. I just put a high flowing Magnaflow muffer on my car because I'm shooting for maximum horsepower, and it really makes me miss the rusted out Flowmaster I used to have. It was music to my ears.

PATRIOTIC1911

iTrader: (2)

Ya, the 80 series in my book sounds perfect. I LOVE the low idle rumble I get and so does my wife.

IROCThe5.7L

As it was already stated. No way is an 80 series going to make you lose power if you're close to stock. Get into heads, cam...etc Then I'd look for a better flowing muffler. I was very happy with my 80 series when I had it on the end of my full exhaust.

IBrockZ

iTrader: (3)

Hey 89******bird I was curious would there be any benefit of running 3" tips rather than the 2.5" tips like DynoDon provided? or is there any Magnaflow mufflers that have 3" inlets as well as 3" outlets in order to run 3" tips? or is 3" tips over kill? My car is an LB9 G92 5 speed car...

IBrockZ

iTrader: (3)

Still considering this set up to replace my stock exhaust... Will I notice any gains on my stock 305 TPI with SLP Headers and y pipe? (compared to stock exhaust).

MoJoe

iTrader: (5)

2x 2.5" tailpipe will flow more than the single 3" pipe feeding the muffler. The 2x2.5s would keep up with a single 3.5, if anyone made a muffler with those fittings. You would have to go 4" or dual 3" to need more tailpipe.

IBrockZ

iTrader: (3)

I see what you mean that's kind of how my buddy explained it to me but the way you put it made it make a lot more sense. Thanks!

Rioux

Hello,

I checked these items to install on my TA 85;
WLK-53061 INTERMEDIATE PIPE; $63.97
WLK-54064 INTERMEDIATE PIPE; $46.97
At Summits or Walker site; this pipe is for 1998-2002 Camaro/Firebird.

My questions: this pipes fits 100% on 1982-92 models ? or need adjustment ?

Thanks

ray jr

iTrader: (2)

do you know a part number for a high flow cat for this exhaust ? i bought the magnaflow 93441 and that one doesnt work ..

Dyno Don

iTrader: (7)

http://www.catalyticconverter.org/ne...erter-&News=89

Although some while back Magnaflow made some 93441 cats with a 2 1/2" cat adapted to the 4 bolt 3" flanges.

But they fixed them years ago.

ray jr

iTrader: (2)

the problem im having is the 54064 intermediate pipe is way short of the converter and is a slip fit , not a flange type end like the 93441 and factory converter has .. guess i will just get a 3 inch slip fit converter on each side and have a extension pipe made ..

AmorgetRS

iTrader: (6)

That would make sense if it was designed for the 98-02 since the cats were moved to just off the exhaust manifolds and the y-pipe meets further back with a slip fit connector.

ASE doc

Don't mean to take this thread off topic, but I'm curious on the subject of power loss/gain with various mufflers. Has anyone done a study or have any idea about the power loss/gain with the Powerstick or similar chambered mufflers?

Ron U.S.M.C.

Here's a few charts = https://www.google.com/search?q=muff...Cpnf9dX9Bpk%3D