i have a 1988 camaro that i would like to have a true dual exhaust. i was wandering if anyone had tried it? click the link to see 89009

I bought the same kit from Summit and I'm just getting ready to start installing it. I had to redo the bottom of my headers cause my old y-pipe kept popping off of them when I got on the gas hard so I welded them together. Yeah, stupid I know, but I was getting frustrated with putting it back together every day. Anyhow, I just got the headers fixed up and will start installing it later this week. I plan on taking plenty of pics and posting everything in a thread since no one seems to have any pics or info on this kit.
So far I've noticed the following:

1-its a REAL tight fit between the front pass side frame rail and the pinch weld. I also needed to trim some of the plastic wheel well splash shield off and I need to trim a bit off of the catalytic converter heat shield.

2-Cats are almost guaranteed to be a no-no. I don't see any way to put them in the stock location. I haven't gotten to mock it up any further back than that yet.

3-I'm not going with their recommendation for mufflers. I'm either going to use a pair of glasspacks somewhere in the trans tunnel or I'm going to find a dual-in dual-out muffler that I can run the pipes in and out on opposite sides so I still have the tailpipes on either side in the back. Having them both come out the back on the same side looks horrible IMHO.

4-Clearance around the oil pan and crossmember is good, and they tuck up nice and tight to the underside of the car. In the front I won't lose any ground clearance at all.

5-If you have subframe connectors already installed, you can probably forget this kit. I don't think its going to work with the majority of kits out there. I plan on fabbing my own so its not a big deal to me.

thnx for the reply hope it works. send pic.s

Np. I'll post up the link to my thread once I get it started.

So you can only use shorty headers on this package ? And why does it say you can only use it on a 305 ? A 305 and 350 use all the same stuff.

Yes to shorty headers only. Unless you want to modify the kit. It is designed and made to fit a specific set of headers also made by Dynomax, P/N is 85012, but they can modified to fit others I'm sure.

As for why they only list a 305, I don't know. I have a 350 in my Camaro and the headers bolted right up with no problems and I've been running them since last June.

Where is the exhaust suppose to exit and where do the true dual travel all to 1 side or each down one side of the frame rails ?

Both pipes go out around the passenger's side front frame rail, then down that side of the trans/driveshaft tunnel and up over the axle. From there they are supposed to go into to separate mufflers mounted crosswise and both exit out the rear on the driver's side. As I mentioned in my first post, I'm going to be modifying the kit because I greatly prefer the way 1 exit on each side in the rear looks.

Here's the link to the instruction sheet for the kit on Summit's site:

http://static.summitracing.com/globa...structions.pdf

The pic on the first page of the PDF will give you an idea of how it is routed.

Seeing as how it is only 2-1/4 maybe it has something to do with horsepower ratings for the 350 compared to the 305?
Just tossing out an idea.

2 x 2-1/4 will easily support a 350. The reason they say 305 is according to the instructions it is for a 82, which the 305 was the only V-8 available. However, even the instructions state 305-400.

It works, it's not a great fit, but I use it currently on my LSX swap with an LQ9 LS1 shorty headers, and a XER281HR cam. You can find my posts about it through my username.

I want the same exhaust for my 1987 Camaro IROC-Z. I just didnt know with the engine because i had a 305 but now i have a 350 so i didnt know if it would work. That answered my question. Thanks. Just dont know what mufflers to get and i dont want to put glasspacks on.

i think i'd rather put glasspacks on it and run my own syle exhaust out the back. I deffinatly wont put the two pipes side by side.

yea i dont like the exhaust pipes side by side either. i think split rear would look kool. i would do glasspacks but me only being 16, going to be 17 in a few days, i would get probably pulled over by the police all the time lol.

Side by side gives you maximum ground clearance. The exhaust is mounted in the stock location. Glasspaks arent worth a cr@p. You Need to use Moroso spirals or Dynomax bullets. I drive around with them and never get pulled over knock on wood.

Hate to burst your bubble there, but according to Summit's website the Dynomax bullets are a "glass wrap perforated tube" style of muffler. Sounds like a glasspack to me

Hate to burst your bubble kid but you obviously dont know what a glasspak muffler is. A moroso sprial and a dyno max bullet muffler are more for drag racing. They are on e of the least restrictive muffler you can by.A glasspak muffler is just the opposite and is what people put on the muscle cars back in 70's and what hillbilly joe throws on his farm truck and they are one of the most constrictive mufflers you can buy due to there design.They are in no way the same muffler. Dont open your mouth if you dont know what your talking about.

Big difference

Bullet/glasspack are the same thing. I've had dynomax bullets and cherry bomb glass packs, cut them open, saaaame thing.

Spiral flows are a cylindrical style muffler that uses a "screw" style setup for dampening sound with no packing. Certainly different.

I never said the moroso's were the same as a glasspack, only the dynomax bullets. The first pic you posted just proves my point. Inside the glasspack is a tube with holes in it(perforations) that is wrapped in fiberglass and enclosed by the outer shell. Same as the "glass-wrapped perforated tube" inside the dynomax's.

And while SOME glasspacks are very restrictive due to the holes in the tube being punched out so that they form "louver" that protrude into the center of the glasspack, there are others, like the one in your pic that have no such restriction. If you look carefully at that pic you'll see that the holes are punched facing the outer side of the glasspack, not the inner side. Where is the restriction there? You can also buy them in the next size up from what the rest of your exhaust piping is so that you end up with essentially a straight pipe exhaust system.

I may not be a drag racer or professional engine builder, but I do my research before I make any changes to my Camaro and I learn the pros and cons of what parts I intend to use and how they will function.

glasspacks can be installed two ways
there are louvers inside
if you point the louvers upstream so that they "catch" air and push it into the fiberglass, they are restrictive
if you install them backwards, you get less restriction, and less sound reduction.

Here is a walk around of an LSX swap with the dynomax true duals on it. The muffler positioning was modified so that I could place one glasspack/bullet on each side.

If you go this route, just have some one who will take the time do it right.
http://www.youtube.com/watch?v=zoOUsDtNpQk

Didn't even think about that. However I thought the 350 restriction only lasted from 84-86....

Ohh and to the one wondering what kind of muffler to use:
my 87 iroc with a 350 had a flowmaster single in dual out muffler (3inch tail pipe one on left n right side). It had a nice sound to it. Not too loud but noticeable.
Also few people in my Hs had camaros and mustangs and mine def. had the throatiest. Want to say it was a flowmaster 40 series....

does any one have pictures of this kit installed and during installation?

i want to say u were talking to me. yea i like flowmaster but there like $80 a piece and for 2 it would be like $160, i dont have that kind of money.

do u think that these mufflers would be okay, they sound good to me(went on you tube). http://www.summitracing.com/parts/WLK-17655/

84 z28,
r u saying that if u were to make it split side that the exhaust on jegs or summit says it is that u would lose ground clearance. How?

From 1982-1986 no F-body came with a 350. They had several 305s offered in the LG4, L69 and the cross-fire injected 305, LB9 (TPI) and LO3 (I think, not sure what it was first offered, it may of been 87), but they are all 305s.

Thrush welded on my LSx swapped firebird: http://www.youtube.com/watch?v=hyRWfFqCQaE

wow, thats all i can say. $750 L98, that sounds awesome. u think i would have good ground clearance with those mufflers on the dual exhaust setup on jegs or summit(wat this post is about)

I currently have them out back, not under the car, so ground clearance is a non-issue. You know how the new mustangs have the mufflers at the rear? Mine are just like that, they sit sideways with a tip on each side. Mine still need to be welded up so they sit flush, but they fit fine - my pipe is just currently bent for the old glasspacks I hacked off.

It sounds much better in person too, very deep and throaty, but has almost the same WOT sound as borla XR1 mufflers. I like them a lot.

I also use the jegs/dynomax true duals kit (part #89009). I had to modify it a bit to work with the LSx and 4L60E, but here are some pics:

Looks like u have good ground clearance there. Do u also have cats on ur exhaust $750 L98? Did u have to fab up any new exhaust hangers/ muffler hangers too? I am sold on this exhaust, have to buy one when i have the money.

I do have dual cats on it, run through the stock position, They used the stock hanger locations on each side of the car. They look like the hangers that used to hold up each tip on my old system. clearance is pretty good with the set up, it get a bit close to the panhard, but a cheap tubular panhard would more than fix that.

Okay so u used the stock exhaust pipe hanger and attached it to the muffler. I dont think i have a panhard so i think i will be okay there. What size cats do u have on this set up? And also in the end how much did it all cost for u? Thank you

I sure hope you have a panhard bar, because if you don't the rear end of your car will have nothing to stop it from shifting side to side...

I used 2.5" in/out cats, you most likely have the stock panhard bar - which is what I have. For me the cost was more than I had intended. (around 600 for install, pipe, and custom Y pipe). The LQ9/4L60E required that I have a Y pipe made custom for my particular car. This kit (89009) SHOULD bolt up directly to your car, however, if you want a muffler on each side, the back end of the kit will have to be modified.

yea i have the stock panhard bar, i just didnt know at the time of the post

So did u but adapters from the cat to the exhaust because the cats are 2.5 inches and the exhaust is 2.25 inches. So i wouldnt need a Y pipe cause i dont have a LQ9/4L60E. i have a 350/700R4, so i should be okay.

Thank you for all the help.

i have an 1988 iroc tpi i just bought headers shorty style and went from 3inch ex. with supper 44 flowmaster it was single. i went to dual 2 in a half with glass packs no cat and trust me its louder then the flowmasters.

Here is my experience so far installing this kit:

http://www.thirdgen.org/techboard/ex...l-exhaust.html (Jegs/Summit Dual Exhaust Kit Install)

Hey I was wondering if you could put on the recommended headers with the engine in the car. And I might have to do this is stages, so is there any way that the headers would bolt up to the stock exhaust so my car is still drive able

Yes, the recommended headers bolt up with the engine in the car. Its easier if you remove the steering shaft and #5 spark plug though. Driver's side requires some wiggling, but the passenger's side is real easy.

I had it bolted up to my stock V6 exhaust from the cat back, but I had to fab up my own y-pipe. The stock manifolds use a 2-bolt ball flange, the headers have your typical 3-bolt donut gasket flange. I guess if you cut off the stock ball flange on the y-pipe and welded up some header extensions to match the gasket on the headers it would work.

will this kit work with sub frame connectors ?

From my install so far it doesn't look like it will. I plan on making my own so I haven't really looked into the aftermarket ones that are available. Maybe the Alstons would fit, but I don't know for sure. Best best would be to contact several sellers/manufacturers of SFC's and ask them.

Hey guys, bringing back a lost thread. Well anyways, I have been looking into this kit. I like it alot, but they no longer sell the headers that they have listed for you to lose. So I was hoping you guys could point out some headers that would work.

I managed to get my hands on a set of the recommended headers(before I even heard of the kit actually) so I'm not gonna be much help unfortunately. I think it should work with any standard set of shorty headers, but don't take my word for it.

what are the recomended headers ?

Any Updates?