Just installed a magnaflow cat back stainless steel on my 88 camaro IROC. My engine has been modified with Edelbrock 202 aluminum heads and headers (roller rocks and a few other things) but the sound is great.

 

Hi guys, awesome sticky, been reading it like mad. Here's my set-up...4-bolt 350 truck block sitting in my 84 z28, Hedman shorty's with 2.5" collector, and I need to hook up to stock. I know Hedman and other's make y-pipes, and I will buy one if need be, but a local has a Borla y-pipe made for 4th gen LT1's up for sale, and the price is too good to overlook if it will work for my application. Any light to shed on the subject? thanks guys, 84Z

 

Correct me if im wrong...but i do believe magnaflow makes a catback for the third gen birds and camaros. http://www.magnaflow.com/02product/d...rtnumber=16829

Like i said i could be wrong.

 

They do, I have one. It definitely tamed my cars sound, but still sounds excellent!

 

just wanted to say thanks to urbanhunter, this thread was very helpful. to put my 2 cents in, i went with the hooker aerochamber with no cats. i couldnt be happyer. as far as volume goes, dont try to sneak home at 3am with it, lets put it that way. it is one of the louder non glasspack setups ive heard, but its not screamin loud. its deep and toned, sounds excellent with the cam at idle. ZERO drone on the highway. i cant understand why hooker isnt a more popular choice for mufflers, id recommend it to anyone who wants the tone of the magnaflow and is willing to give up the stainless pipes for more noise

 

I want 3in in/out magnaflow muffler but how do i kno what overall size to get? im kinda new to all this.

 

Has anybody used the Magnaflow 16829 on an 82 model year camaro?

 

how good is the flow on the stainless works cr 2525? summit doesnt show it anymore and i may buy it from stainless's website... they have the 3 inch option.. another thing is since its single in n out. would it be better to mount it right after the cat and route it through the back into 2 pipes? or should i keep it single.. im also thinking about making it end b4/after the rear tires.. but idk how much it will interfere with my powerband.

 

Banks/cutout sound clip

 

I have Edelbrock 3 Inch RPM Cat Back, with 2.5 Outs, it sounds great, I have had it since 1996 on this car still looks great and the Tail pipes are real nice looking with the miter cuts, I also have there coated Headers with 2.5 Inch y Pipe I do not have a cat.

I am unsure why people don't care for this system it has given me no Problems.

 

Please help !

Let me start by saying I know very little about cars and have to have all my work done for me.

I own a 1984 TA with a rebuilt 327 engine w/ headers and a High flow cat.

can anyone recommed a complete cat back system ?

Flowmaster told me they have one for an 86 and up TA and that it would require modification.

I did see a dynomax turbo that was listed for a 8 cyl firebird.

I'm just looking for somthing that is an easy fit and no modifications if thats possible.

Like I said I have all my work done for me. One guy told me to have my cat removed and put in system and the other guy who actually put the motor in for me is telling me to just use a cat back.

 

I have an 86 iroc vin f. Lb9 motor and I'm having trouble finding a stock y pipe that will fit.. I believe I have the stock manifolds but the y pipe I removed was 2 1/2" in diameter. Was this the stock diameter for the y pipe?

 

did magnaflow stop making the 16829 cat back for third gen? last I looked it was available from Summit, but its been a while

 

It's still on their site.

http://www.magnaflow.com/02product/s...ne=all&id=9181

 

Amazon.com has it along with Jegs performance.

http://www.jegs.com/i/Magnaflow/642/16829/10002/-1

 

I would recommend getting flowmaster. Instead of magna flow. Flowmaster has chambers. An acts like a vacuum. All exhaust pulls out easily magna flow has patting an will over heat. N pnce it heats up. Thats when noise gets more muzzled there both goo . I had slp loud mouth 1 an 2. An love the flow master .. thats my opinion. .. i also want to know has any body tried the flomaster. Hp2. I want to run true dual exhaust on my 91 3rd gen 1le 350 tpi. I herd. These are. Nice at crusing but have a nice roar when punched

 

Mac also has a very nice quality and great sounding 3" catback for these cars. Here's our 91 z28:


and a few other cars out there:

 

Third video down is my RS

I absolutely love the tone of the MAC catback, I will be swapping it onto my iroc in the future

 

Oh cool! I love the tone too, sounds like no other.

 

Good post! I have the Magnaflow with edelbrock headers and custom dual cat y-pipe tying to 3" cat-back system with 2-1/2 outlets with 3-1/2 tailpipes. My '92 Z28 5.7 motor is stock.

Its quiet compared to the old force II Flowmaster system that rusted out after so many years. The muffler seems to be dead at cruzin speed compared to my previous Flowmaster. Not sure if I'll try to fit a Flowmaster 80 series in its replacement though.

should I try highflow cats or gutted cats?

 

I was looking through this thread trying to pick an exhaust for my Stock 88 RS Camaro, 305 TBI. The thread started 10 years ago.. Was wondering if anything new has come along.. I know in the first post, it suggested to always go 3". Was really wanting the Dynomax Super Turbo before reading this, but doesn't seem to be available. I'm looking for something a bit deeper tone than stock, but don't want it to be too loud or droning sound in the car while driving. What 3" systems would give a step above the stock sound?

 

Honestly I don't know what is still out there for these car's, I really like my Edelbrock and would go that way again if I had to ( I know they are no longer made ) I also do Like Flowmaster but I would probably lean toward Borla if they still make a system. 3 In single to dual outlet is fine for your vehicle.

 

the MAC I have is exactly what you are looking for, it's a good bit deeper than stock and not loud on a TBI. I'm sure if you put headers on your car it would be louder than mine. But it's not a bad sound at all and mostly no drone inside the car cruising down the road.

 

Thanks.. I ended up getting the Magnaflow 16829 system.. Local place had it in stock.. After looking at the MAC, probably would have saved a few bucks even with shipping..

 

Magnaflow has the sound you were looking for too, so still not a bad choice

 

Glad to hear.. Thanks!

 

Trying to help get dad's 1989 GTA back together for him. We would like a decent cat back system. The car has the 5.7 with the factory dual-cats that are in great shape. Muffler back has been fairly easy to find. Tried finding a stock intermediate pipe with the band-clamp connection but cannot find one. Looks like everyone only offers the flange-type. Any suggestions? I guess we could take the old intermediate pipe to a muffler shop and have one made?

 

Hi friends, this is my first post/reply so go easy on me if I'm doing it wrong or in the wrong place.
I'm finally ready for performance exhaust and I'm having a problem because all the bigger contenders seems like only offer "Non HO" cat back packages.
What am I missing? Or how do I go about getting more airflow out?
I'm open to replacing the cat, and on back, not super sure if I want to go into headers and all that just yet- unless I absolutely have to.
Any advice? I have a 1984 time capsule Trans Am - 305 L69 "G" engine - HO of course.
Thanks!
Nick

 

Yeah, the pickings are slim these days.

Good thing is your car is a L69 5.0L H.O. so it has the H.O. exhaust manifolds. You not going to find anything that is bolt on for a 1985 down with its weird oval opening 4 bolt design catalytic convertor.

You will need to go to the 1986 5.0L H.O. / 1986 to 1989 TPI single catalytic convertor exhaust setup.

Do you want to keep a factory appearing style exhaust system?

 

Thanks for this info. I'm still learning.
Yes, mostly stock vibe would be great.
I want more performance and maybe a touch more growl, but not a lot. I already have a significant drone on the highway.
So I won't be messing up the engine scavenging by using different exhaust with the HO engine then? It's weird all these parts say "Non-HO"

 

As you probably know, Nick, in CA they thoroughly check older cars for smog compliance, by the numbers and visually, so unless you've attained smog exception status, somehow, then you should probably stick with the factory cat and manifolds, because the tech will notice the changes and most likely ask for manufacturer's proof of CARB compliance.

I think all manufacturers have discontinued CARB approved 3rdgen headers anyway, so unless you can find used ones that you're ok with, or possibly new old products, then you're going to have a hard time finding some.

CA is especially strict about cats, so unless your cat is clogged or causing you to fail emissions tests, then you should probably keep it, because CARB approved cats are about twice the price of federally compliant cats. And if you're shopping for cats online, then you're likely to see disclaimers that say something like, "will not ship to CA."

A cat-back won't be illegal, but as mentioned, the front and rear of your cat isn't slip-fit like most cat-backs you'll find; there's a flange at each end. But I suppose you or a shop can modify everything to slip-fit, or probably safer and simpler to modify a new cat-back to fit the factory cat and y-pipe.

Also, if you've skimmed through the sticky threads at the top of this forum (like this thread), you might've noticed how out of date they are. The vast majority of the links and products are dead and gone, so you probably won't find them to be of much help.

Now, if things have changed in CA since I moved away, or if you have exception status (because I've "heard" that a car registered as a "classic" automatically receives exemption status, which isn't disclosed when registering for such status, otherwise everyone would try to register old clunkers as classics), then never mind lol, and have at it!

 

Appreciate all this info!
You are still dead on about the CA laws. If the "Leno Law" passes I will be exempt HOWEVER I head one would have to register as a "classic car" and get all that goes along with that, including mileage limitations etc. For now, and since this car is such a time capsule (30k original miles, 98% stock) I think I'd be fine w/ keeping the original headers, Y, and Cat.
Finding a great cat-back that works with the HO 305 would be the goal right now.
Thanks!

 

ps.... going with Airwolfe's suggestion of inputting a "1986" 305 HO - seems like these are 3 possioble options..

Magnaflow
https://www.magnaflow.com/products/1...t-system-16829

Dynomax
https://www.dynomax.com/dual-2-5-cat...ler-17485.html

Hooker
https://www.hawksmotorsports.com/86-...system-hooker/

But what you guys are saying is that I will need a custom mount at the Cat no matter what- to marry the oval Cat flange to the round pipe, correct?

Thanks,
Nick

 

I completely overlooked the fact you are in California.


Magnaflow 16450 Y-pipe.


There goes my idea of using Magnaflow's wonderful H.O. single cat Y-pipe and their 1986 to 1989 3" inlet 2.75" outlet catalytic convertor. Even though they do make that cat in a CARB compliant version that will fit that Y-pipe the Y-pipe itself doesn't have a CARB E.O. number. They also probably aren't going to let you change to the 1986 to 1989 style catalytic convertor either.

You could use the 1986 to 1989 H.O. style cat back system but you would need to have made a 1989 Turbo TA style oval outlet 4 bolt flange to 2.75" ball and socket cat convertor flange adapter. That should be legal because it is behind the catalytic convertor.

If California was sensible and let you makes changes that were within the spirt of the law that would still pass the sniff tests it would be great. But they aren't. They are Eco *****.

My brain is mush right now because I've got up early to go to a car show today. I'll think on it and get back to it later on.

 

I picked up raw 4 bolt L69 flanges from Torque Tech when they closed up shop. I am not yet sure how a 3" pipe, sem flattened, can be inserted into the 2.5 x 3" opening. I don't think creating these or making things fit would be a problem for an exhaust shop.

Back when Hooker included a pre-welded flange+pipe piece in some of their cat-back systems, the pipe was 2.5". Disappointing. But it works great for the 4th of July to set off rockets.

 

Hello,
I am new here. I know this thread is old and I just purchased a Magnaflow #16829 for my 1984 Z28 H.O. I am confused because this thread says there are not any Magnaflows for Gen3 but everything I researched said this model would work on my 84. I did get a Panhard support relocation upper bar to allow 3" over the axle.

 

Hey there and welcome. Please let us and me know how that system works out. I have an 84 T/A HO and I'm curious. That's the part number that comes up for mine although selecting the HO model isn't an option on their site. Does your cat have the oval flanges? How are you handling that junction? Thanks,
Nick

 

The exhaust system was completely rusted out. I'm replacing the CAT with a Magnaflow #93519 which is their universal CAT. This car has 30K original miles and was what I drove in High School in 1988 then it sat in my parent's barn for over 30 years. I just got the car from them a few years ago (didn't know they still had it) and started the restoration in July 2025. Got it started on November 22nd with my portable gas can bypassing the fuel tank. Now moving on to the rear end replacing fuel tank and sending unit and all new exhaust with Dyno Don headers and Y-Pipe underneath. It will take some fabrication to install the CAT between the Y-pipe and the #16829.

 

Killer!
May the force be with you and enjoy the process.

 

Why not just get the Magnaflow 93441 cat?
It will literally bolt right up to your Magnaflow catback and dyno don y pipe.....

 

I called Magnaflow on that and asked that same question. They said it will not bolt up to their cat back, I could go ahead and get both then take a look at it.

 

Manic Z! Thank you so much! I called Magnaflow again and this time spoke with the lead tech support guy and after 20 minutes he confirmed they will bolt up. So, I switched my order to the #16829 and #93441. I would like to shake your hand! Thanks again for being so helpful! Much appreciated!

 

@decurl

The Magnaflow 16450 409 SS Y-pipe will replace your factory Y-pipe. It won't have the rectangular 4 bolt flange with oval outlet.

Magnaflow 16450 | Chevrolet Camaro | 409 Stainless Steel Front Y-Pipe




The Magnaflow 94441 catalytic convertor will replace your factory catalytic convertor. It won't have the rectangular 4 bolt flange with oval inlet and outlet. It will have a slip fit inlet and a ball and socket joint outlet.

Magnaflow 93441 | Chevrolet Camaro | Catalytic Converter-Direct Fit | Standard Grade EPA Federal Emissions

The Magnaflow 16829 409 SS catback exhaust system will replace your factory cat back exhaust system. It won't have a rectangular 4 bolt flange with oval inlet on the intermediate pipe as it will have ball and socket joint inlet.

Magnaflow 16829 | Chevrolet Camaro | 409 Stainless Steel Cat-Back Performance Exhaust System

You will need to source an automatic transmission to catalytic convertor exhaust system hanger from a 1986 to 1989 Tuned Port Injection car with a single catalytic convertor exhaust system to replace the 4 bolt flange style used on your car or modify it to fit the style flange used on the 1986 to 1989 H.O. single catalytic convertor.

You will be replicating a 1986 L69 5.0L H.O. & 1986 to 1989 LB9/L98 TPI H.O. single catalytic convertor style complete exhaust system using aftermarket Magnaflow parts.

 

Thank you Airwolfe! I already ordered the Dyno Don Y-pipe and headers. I feel better with Don's Y-Pipe matching up to his headers over the Magnaflow. Then Don's Y-Pipe should match up to the slip inlet into the 93441 fairly well and I may need to fabricate at that connection. I am glad to know the 93441 and 16829 will match up. I found a Walker hanger #35245 that looks like it will work. I appreciate all your help with this! You guys are great!

 

Don makes excellent headers, Y-pipes, and other exhaust system components. Yes you should use Don's matching headers and Y-pipe together.

The Magnaflow catback for our cars is somewhat universal in that it will work with the low output single cat, the high output single cat, and the N10 dual cat cars. It comes with different pipe adapters for the front of the intermediate pipe where it connects to the catalytic convertor.

It's not a 100% bolt in for all F-body cars. They don't make an adapter for the 1983 to 1985 4 bolt flange with oval inlet and outlet catalytic convertor like your car has nor does it fit the factory 1989 to 1991 style N10 dual convertor Y-pipe with the "Hog Clamp' style connection. It probably doesn't directly fit the 1991.5 to 1992 factory N10 slip fit style Y-pipe either due to 2.75" vs 3.00" outlet and inlet diameter so both style factory N10 dual cat systems will need some work done there. If one uses Magnaflow's N10 dual cat Y-pipe it's a direct bolt on with Magnaflow's cat back using no adapter.

The Walker 35245 hanger has the bolt pattern for the smaller low output single catalytic convertor as used on V6 and low output V8 LG4/L03 TBI/1990 to 1992 TPI low output single cat cars. The High Output single catalytic convertor for 1986 to 1989 used a different bolt pattern on the convertor flange. I'm going to look around and see if they have one for another application that looks promising to use with their H.O. convertor.


High Output Convertor

Low Output Convertor

 

hey guys i have an 82 Camaro and i want to get rid of my stock exhaust and put a custom exhaust coming out the side of the car and i was wonder if you guys have any tips or know of any complications i might run into. so what I'm thinking is that since i have long tube headers on it i would run 2.5 inch tube off that into an x pipe and have my mufflers come right off the x pipe and then have tubing off the mufflers dumping the exhaust out the side of the car.
for mufflers im thinking of the SpinTech 6000