Jay87Z

iTrader: (2)

Hey guys,
I'm on a pretty tight budget for my LT1 swap. As a temporary thing I was just going to use my stock thirdgen exhaust. Today my dad was thinking maybe we could use the LT1s exhaust manifolds with the LT1 stock y-pipe. I know the complete y-pipe won't work, but he was thinking of just using part of it and then fabricating the rest. Will the LT1 manifolds fit in the car?

I know I should get headers, all in good time. I don't have alot of money and I Just want this car on the road. I would rather sacrifice some horsepower and just get this car on the road now since its been parked for 2 years.

Klortho

That would be a big negatory, where the 4th gen manifolds exit out it would hit the a-arm mounts on the crossmember.

beedo

use the factory thirdgen manifold and all of the exhauust will b olt up.

Jay87Z

iTrader: (2)

Thats the plan now. Just need a O2 bung welded in the y-pipe.

Eventually I'll have the Hedman d-port shorties, but they are backordered and I don't have time to wait around.

Klortho

Better get two O2 bungs, gotta have one for each bank.

Jay87Z

iTrader: (2)

Driver side stock thirdgen manifold has a bung on it.

Klortho

Geez...I just thought...that thing is gonna be choked down with the third gen manifolds on it.

Jay87Z

iTrader: (2)

Yes I know. When Uncle Sam decides to pay his war fighters a better salary, I will be able to afford to spend more of my money on car parts. Until then, I can't afford to do much.

The car has been parked for two years.. back when I blew a head gasket or cracked a head. I just want the car on the road now, I'll worry about optimal performance later.

evoluzione1

I just put a LT1 in my car and used the 4th gen Manifolds. It took using the third gen and 4th gen y pipe with some fab. but it works fine. When on a budget do what you can with what you have. Everything fits great.


Good luck.

JeRM82

When you used the fourth gen manifolds did you have any clearance issues with anything (Mainly the crossmember, or the steering set-up)? Did you use an aftermarket crossmember?

evoluzione1

I have an 83z28 and have no clearance trouble, no modding of any type to use the 4th gen stock manifolds except the Y-pipe.

Rich2279

iTrader: (7)

Ok, so they fit. I was worried when I read someone else said they wouldn't fit. I want to use the LT1 manifolds until I pick up some headers.

Air_Adam

Looking at my '97 Z28... the manifolds look like they are 'ducted' roughly the same as a 3rdgen manifold was, so I don't see why it wouldn't fit. They fit tighter to the engine as well.

Klortho

When I tried mine, it came out with part of the manifold hitting the crossmember, thus the reason I went with headers.

Rich2279

iTrader: (7)

Hmmm...so in some 3rd gens with an LT1 engine the LT1 exhaust manifolds will fit and in some 3rd gens the manifolds won't fit? LOL

BigWhiteGTP

Just to get it on the road, use the thirdgen exhaust, no modifying, cutting, welding needed. 4th gen exhaust still sucks.

FueledSoul

iTrader: (18)

id say buy cheap headers at least . . . Why put a LTX in if you dont plan to optimize its potential performance?

Klortho

No, the LT1 manifolds won't fit at all, the exits come out right on the a-arms, at least they were going to on mine, and the driver side was hitting the k-member.

GMan 3MT

iTrader: (4)

For those that were able to use the stock LT1 manifolds, what did you do about the big flange on the drivers side (that connected to the LT1 cat)?

I think I'll have to have a Y-pipe fabbed up anyways, is there a way to avoid using the huge flange?

Rich2279

iTrader: (7)

I used the 3rd gen y-pipe and cat. w/4th gen flanges on the end (where it connects to the manifolds).

89rs454

So do the 4th gen manifolds work with the ltx swap or not? I'm about to pull the lt1 out of a 95 donor and need to know please.

LeMons Monty

I'm in the midst of an '95 LT1 into '89 Iroc-Z swap and I can tell you that the LT1 stock headers do not fit. They dump way ahead of where the stock 3rd gen ones do. They also have a different connector, since one of them bolts directly to the catalytic converter. I'm using a set of Edelbrock headers meant for a 305. They are a little too small in diameter in a few spots, so some minor porting is required. If you have a 350, your headers should be fine.

shone190

I just put 1993 Camaro LT1 in my 1988 GTA and stock LT1 headers fit perfectly

89rs454

That's what i have been telling these boys, it's amazing all the bullshit that gets spewed over the internet. You got to buy headers is all i heard. I have an all Stock LT1 with a 3inch exhaust with a Flow master cat back and CAI from the 95 4th gen Fire bird. I got the engine, transmission, rear end, and gas tank and exhaust all to bolt up to my 89 Camaro.

John in RI

iTrader: (167)

There's at least 2 versions of "stock" LT1 exhaust,....... single or duel cat. This might be part of the reason there's some inside this thread.

Twin_Turbo

iTrader: (25)

The manifolds are the same for both systems, it's simply a rear exit header. I'd bet even a set of corvette shorties would fit, either C4 TPI or C4 LT1.

John in RI

iTrader: (167)

You sure about that ???





You can CLEARLY see that there is a difference in the STOCK 95 Single Cat Y-Pipe and (and Manifold flanges ) compared to a STOCK 97 LT1 Duel cat Y-Pipe.

All stock LT1 Exhaust Manifolds are NOT the same.

KRACKER JACK

I bet the guys saying the manifolds do not fit are using the corvette manifolds, they exit in the center. I am about to do this swap and document it with videos to make it as easy as I can for anyone to do the swap. if you don't want to miss it subscribe to my channel.

Twin_Turbo

iTrader: (25)

You are shoeing a y pipe. The guy asks about manifolds. O sorry you must be from the my toolbox only has a socket set club. Firewall back a 4th gen is damn near identical to a 3rd gen apart from the front subframes.

John in RI

iTrader: (167)

What is wrong with you ?? Seriously; What is wrong with you. That's one heck of a tall high-horse that your sittin' on there "turbo". You're gonna 'call me out' over a 7-year old thread ??? Someone **** in your lunch or sumthin' ?? Some guys said LT1 manifolds fit - and some guys said they didn't. No one had pics and no one confirmed what year the LT1 manifolds they were using were from. Did I say one fit and one didn't ; No. What did I say ??


--------------------------- > Focus now <--------------------------


You said: Twin_Turbo: I said:


What do you not understand........ ?? What is wrong with you ?? I have a 95 LT1. The dual cat from a 97 LT1 would not fit my 95 LT1. Why? Because the the FLANGES ARE DIFFERENT. I didn't have 2 spare sets of factory LT1 Exhaust manifolds hangin' around, but I did have the 2 different Y-pipes and posted a picture to CONFIRM that the flanges are different. Can you not see that the flanges are different ?? How am I "wrong" for what I wrote ?? 2 types of flanges on the LT1 F-Body manifolds,........ OK ?? Get it ?? You were wrong. 7 years later you want to step on me over this ?? What is wrong with you ??


OK: Let's measure: I'm an American guy - pretty typical really. And if you expected this American Craftsman not to respond to your crap - you were wrong - AGAIN. ( I wrote wrong "again" cause I'm sure me showing you were wrong in the first place still hurts, 7 years later and counting. ) I've been drivin' Thirdgens since before the 'Wall' fell and have a Bow-Tie tattoo ( made the dude outline it 4 times before giving him the OK.) My hands have touched more Thidgens than you have ever in person and have owned more Thirdgens than any 'car club' you might belong to. Owned a 4th gen since Y2K and have more than a little hands-on experience with the the LT1. Here in the North East USA if you want to know what kind of a guy someone is, Just look at his hands.



Since You already seem to already know the kind of guy I am ------> Let's see your paws there "turbo". Lets see what kind of guy you are.


Just for the record,..... Here's my tool boxes; I rolled them thru the junkyard today pulling parts from a 91 Firebird. With these 2 tool boxes I can completely strip a Thirdgen ---------> to the BONE. Those members with a keen eye might notice that my 30+ year old socket sets is hinged together by Thirdgen front seat backrest fabric retainer rod and It's locking-latch is an 86 Z28 Barometer sensor screw and nut. My socket set is the kind that has ALL the sockets; That's the kind of guy I am

--------------------------> Craftsman, BITCH.




KRACKER JACK; if you know what kind of LT1 manifolds you're using can you post pics to help clear up any confusion going forward. Apparently; seeing isn't always believing for some folks, but more pics has gotta' help !

"TURBO": I posted to this thread -------->7 YEARS AGO<----- to try and help. Don't need some "holier-than-thou", King NUTHIN' stepping on me for it. So; I'll leave you with a quote I like from the motor city USA.

dixiebandit69

John, that is my favorite Kid Rock song, although that whole album is pure gold.

I just had to add this.

John in RI

iTrader: (167)

1/2 of my favorite quotes are from Ben Franklin,...... the other 1/2 are from Kid Rock !

Twin_Turbo

iTrader: (25)

Someone forgot his meds. Like i care if you have a bowtie tattoo and what not. Some ink wont add tou your credibility or craftsmanship. Its not like he with the most ink and the tough beard and hoodie like on discovery wins. Quality of work speaks volumes. Ask my customers. Therrs a couple floating around here. The question is will lt1 manifolds fit. Yes they will. Different flanges? Well weld the corresponding ones on. Why do I need to see all thise pics. I have owned rebuilt and modified american cars since the early 90s. And this dick measuring aboit f bodies owned. Lol you dont even know how many I own and how many I have built
I'll tell you 4 hands are indexes too short So because ypire missing a finger (safety first now) I gotta read your rant? Do lt1 manifolds fit? Yes. Thats all. Flanges blahblahyaddayadda.

As for 7yo thread. The garage talk app pits it on top if my list. Cant help it.

John in RI

iTrader: (167)

You got an LT1? Got an LT1 in a Thirdgen ? Ever install LT1 Manifolds in a thirdgen ?? I doubt it. You really expected me to take you spitting on the help I offered here and stay silent - WRONG. The flanges are different - that's ALL I wrote. No matter what you might thinking - that's what I said and that's a fact. The only reason for your post was to be-little me for tryin'; to help. Wanna' be a TROLL,...... Expect a rebuttal ------> BITCH.

Don't want to show off your manicure this morning 'turbo' ??? Purple nail-polish still wet, or is the Pink polish still soft ? When you call someone out and then turn away from the challenge to you it shows how big your sack is Betty. You thought you knew what kind of guy I am,...... This is the kind of guy I am:

http://berlinetta.info/temp/EatSshitandDieBitch.JPG


Go get some Aloe & Keep those mittens on kitten, wouldn't want to get a hang-nail. Put up or STFU -----> BITCH.

Twin_Turbo

iTrader: (25)

Heres my amateuristic nail parlor

John in RI

iTrader: (167)

Had time to walk around and take pics of your rides,...... but didn't take a pic of your hands ??? I'm beginning to understand the kind of guy you are.


Last chance to NUT UP Sucka'.


Lets see those paws of yours,.......... put up or STFU ----> BITCH.

Twin_Turbo

iTrader: (25)

Here

John in RI

iTrader: (167)

Still no picture of the hands,... ***** must not have dropped yet -----> BITCH.