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1988 Camaro IROC

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Old May 24, 2025 | 04:47 PM
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1988 Camaro IROC

I was looking at 1988 to purchase and trying to figure out engine sizes and rpo codes.. I have included pics, the owner not sure of what he has. Before I can make an offer want to know specs.


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Old May 24, 2025 | 05:00 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

It's an LB9, but also a fairly rare G92 automatic only available in '87 and '88. It includes 3.23 gears, an oil cooler and a 145 mph speedo.
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Old May 24, 2025 | 05:59 PM
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Re: 1988 Camaro IROC

LB9 = 305
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Old May 24, 2025 | 09:27 PM
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Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: 1988 Camaro IROC

1985-86 type alternator on that engine.
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Old May 24, 2025 | 10:58 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

That car is an '87.

Last edited by chazman; May 24, 2025 at 11:01 PM.
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Old May 25, 2025 | 12:01 AM
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Re: 1988 Camaro IROC

Here are some more pics, I think car has 86k miles on it, not sure value, going to have to run a carfax.

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Old May 25, 2025 | 12:07 AM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

That's a dealer installed speedo.
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Old May 25, 2025 | 12:26 AM
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Re: 1988 Camaro IROC

Yes pretty sure it's stock speedo, car seems all orginal, I was hoping it was the 350 engine over the 305, not sure what previous reply said rare automatic.
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Old May 25, 2025 | 02:20 AM
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Re: 1988 Camaro IROC

Originally Posted by Therock5
Yes pretty sure it's stock speedo, car seems all orginal, I was hoping it was the 350 engine over the 305, not sure what previous reply said rare automatic.
Chazman meant that the G92 option is somewhat rare. The G92 is the performance 3.23 gears. Non-G92 equipped would have been more of a highway gear at 2.73 at the cost of some performance.
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Old May 25, 2025 | 09:56 AM
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Re: 1988 Camaro IROC

By looking at the RPO codes see anything else rare, I don't know much about Camaro's I am a TA guy.
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Old May 25, 2025 | 10:38 AM
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Car: 1987 Formula (original owner)
Engine: 305 TPI
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Re: 1988 Camaro IROC

That's not the original speedo, so mileage is suspect.
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Old May 25, 2025 | 11:08 AM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

Originally Posted by Therock5
Yes pretty sure it's stock speedo, car seems all orginal, I was hoping it was the 350 engine over the 305, not sure what previous reply said rare automatic.
Definitely not the stock speedo.

The G92 performance package was available on the LB9 305 with 5 speeds. It was only available on the LB9 305 with auto in '87 and '88. That's what I meant about it being rare.
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Old May 25, 2025 | 11:39 AM
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From: belle fourche,s.d.
Car: '82 z28
Engine: L83 5.7
Transmission: 700r4-1985
Axle/Gears: 3.42 posi
Re: 1988 Camaro IROC

That is the earlier version of the "off road"140 speedo.Hard to say what the engine is at this point in time.Car is certainly not "investment grade"example,but does look pretty decent for something that has been messed with a little Look for hidden rust or hard accident damage.
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Old May 25, 2025 | 07:17 PM
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Re: 1988 Camaro IROC

Just in case it was missed in the response, this car is a 1987. The H in the VIN designates 1987, the door panels and seats are 1987 only, the B4Z RPO code is the IROC-Z package and was NOT available on the 1988 models. All 1988 cars with the Z28 RPO code automatically got the IROC-Z appearance/suspension package, so the B4Z RPO was dropped in 1988.
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Old May 26, 2025 | 06:18 PM
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Re: 1988 Camaro IROC

pretty sure it's stock speedo
IT'S NOT.

It's a "dealer installed" package. The car DID NOT come from the factory that way (would have been illegal that year), butt was a package that could be ordered and the stealership could install, for applications such as police use. All it is, is the speedo scale. All the mechanical stuff is the same; the # of degrees of pointer movement from, say, 0 to 70, is the same as stock; just, it doesn't have a stop to keep the pointer from going past 85, and has more numbers printed on it. Can be swapped out in less than 10 minutes. Pop the cluster bezel off, 2 screws, reverse that, down the road.

Not that it makes a YYYYYUUUUUUUUUJJJJJJJJJJJE difference to the issue at hand; other than, absolute accuracy.

not sure what previous reply said rare automatic
Unfortunately that person used the Firebird "r" spank-off word. Always sends the uninitiated (or Firebird people) off the deep end. What they "meant", to the extent that my mind-reading skillz can be depended upon, was that G92 in conjunction with an auto trans is somewhat uncommon; less common, proportionally, to somebody ordering G92 w 5-speed. In NO CASE would I slap the "r" word on it though. Needless to say, in the Firebird world that word gets thrown around pretty casually, ALWAYS as bait to those who get stars in their eyes about it, whether justified or not. Butt this is a Camaro, so in THAT world, the chicken-choking word doesn't apply.

It's a fairly decent looking car though. While I can't give you a number to offer, I can propose that it's near the upper end of the "survivor" price range, in your area, whatever that is. We're NOT talking B-J "time capsule" prices; just, compare it to moderately low mileage, well optioned (though not "the best"), reasonably clean & well- maintained "survivors". Depending on where you are that might be anywhere from $7k or so (desert) to $15k (rust belt).
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Old May 27, 2025 | 06:56 PM
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From: Somers, NY
Car: 1987 IROC-Z
Engine: 5.0L TPI LB9
Transmission: 5-speed manual (T5)
Axle/Gears: 3.45 POSI
Re: 1988 Camaro IROC

One thing to point out is that the RPO codes above show both CC1 (T-tops) and G92 (performance axle ratio). One of the debates on this forum a few years ago was whether this combination was available in 1988. The dealer order guides (for Camaros) explicitly state that this combination was not allowed in 1989 (or later), and there are plenty of 1987 examples with this combination (including my car with a 5 speed). If one looks at the 1988 dealer order guide, one would think that this combination was allowed in 1988. But a few years ago, no one in the forum ever reported seeing a 1988 with that combination, so we concluded that it likely wasn't allowed. When I was shopping for a 5-speed G92 car with T-tops several years ago, I only came across 1987 cars, no 1988 cars.

I have seen 1988 convertibles with G92, so it seems that a special exception was made for those.

I was therefore intrigued by the RPO codes shown above, until a few people pointed out that this car was actually a 1987 model. A 1987 G92 automatic might be less common, but I have seen that combination before.
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Old May 27, 2025 | 07:59 PM
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Re: 1988 Camaro IROC

I was able to run a carfax report and car came back as 1986 Z28...What's that do to the car now.
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Old May 27, 2025 | 08:10 PM
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From: Somers, NY
Car: 1987 IROC-Z
Engine: 5.0L TPI LB9
Transmission: 5-speed manual (T5)
Axle/Gears: 3.45 POSI
Re: 1988 Camaro IROC

The VIN in the Carfax report doesn't match the RPO code decal you posted above. Does the VIN at the bottom of the windshield match the RPO code decal?
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Old May 27, 2025 | 08:25 PM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

Originally Posted by sofakingdom
IT'S NOT.

It's a "dealer installed" package. The car DID NOT come from the factory that way (would have been illegal that year), butt was a package that could be ordered and the stealership could install, for applications such as police use. All it is, is the speedo scale. All the mechanical stuff is the same; the # of degrees of pointer movement from, say, 0 to 70, is the same as stock; just, it doesn't have a stop to keep the pointer from going past 85, and has more numbers printed on it. Can be swapped out in less than 10 minutes. Pop the cluster bezel off, 2 screws, reverse that, down the road.

Not that it makes a YYYYYUUUUUUUUUJJJJJJJJJJJE difference to the issue at hand; other than, absolute accuracy.



Unfortunately that person used the Firebird "r" spank-off word. Always sends the uninitiated (or Firebird people) off the deep end. What they "meant", to the extent that my mind-reading skillz can be depended upon, was that G92 in conjunction with an auto trans is somewhat uncommon; less common, proportionally, to somebody ordering G92 w 5-speed. In NO CASE would I slap the "r" word on it though. Needless to say, in the Firebird world that word gets thrown around pretty casually, ALWAYS as bait to those who get stars in their eyes about it, whether justified or not. Butt this is a Camaro, so in THAT world, the chicken-choking word doesn't apply.

It's a fairly decent looking car though. While I can't give you a number to offer, I can propose that it's near the upper end of the "survivor" price range, in your area, whatever that is. We're NOT talking B-J "time capsule" prices; just, compare it to moderately low mileage, well optioned (though not "the best"), reasonably clean & well- maintained "survivors". Depending on where you are that might be anywhere from $7k or so (desert) to $15k (rust belt).
Come on Sofa, say the word: rrrrrrrrrrrr...arre....
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Old May 27, 2025 | 08:35 PM
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Re: 1988 Camaro IROC

I didnt even notice that, they might have put a new console lid on this car. The vin I ran was on the windshield..Do you know if this is even the correct motor for car?
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Old May 27, 2025 | 08:47 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

Originally Posted by Therock5
I didnt even notice that, they might have put a new console lid on this car. The vin I ran was on the windshield..Do you know if this is even the correct motor for car?
The interior you posted is an '87 only interior. The VIN on the Carfax has the 8th digit as "F" which means LB9. It seems this car has some secrets.
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Old May 27, 2025 | 08:53 PM
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Re: 1988 Camaro IROC

Yes not sure what the guy is selling? With all these different possibilities it could be a mixture of a couple different cars. Definitely not orginal.

Here is a pic of rear of car
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Old May 27, 2025 | 09:00 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: 1988 Camaro IROC

Originally Posted by Therock5
Yes not sure what the guy is selling? With all these different possibilities it could be a mixture of a couple different cars. Definitely not orginal.

Here is a pic of rear of car
'88 and up IROC bumper emblem and '86 rear window and 3rd brake light. The exhaust is a 2OTL maybe by SLP. I'd be interested in the exhaust if it ever is available. I'd go by the VIN tag under the windshield and call it an '86, with an '87 interior, (nice one at that), and some other year parts sprinkled about. If it's an '86, it probably has a 3.23 rear end.

Last edited by chazman; May 27, 2025 at 09:03 PM.
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Old May 27, 2025 | 09:46 PM
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Car: 1987 Formula (original owner)
Engine: 305 TPI
Transmission: T5
Axle/Gears: 9-bolt/3.45
Re: 1988 Camaro IROC

I suspected 86 because of the engine pictures: no heater control valve and type of alternator.

Centerbolt valve covers are 87+, but they could've been added to 86 heads with adapters, or the heads have been changed, or the engine has been swapped.

3rd brake light on the hatch is an 86-only feature. And the VIN you ran shows the engine type is correct: F. But the VIN on the SPID label also shows engine F.

People are saying it has an 87 interior, so maybe the SPID label belongs to the car that was used for the interior swap.

What's the VIN on the door jamb label?

There's a partial VIN on the front of the block atop the passenger side WP mount. And there's a partial VIN on the firewall half hidden by the AC box.
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Old May 27, 2025 | 10:22 PM
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Re: 1988 Camaro IROC

Wow, what is the actual true vin?
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Old May 28, 2025 | 05:15 AM
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Re: 1988 Camaro IROC

The washer pump is on the wiper motor cover, they moved to the solvent bottle in '88. You can also take the spart tire cover off and there should be a VIN sticker on the quarter panel closer to the front, but still visible with a flashlight. There's one on the other side to but is a bit tricker to get to. There should be a VIN sticker on the underside of the hatch as well.
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Old May 28, 2025 | 11:53 AM
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Re: 1988 Camaro IROC

Just wondering what you all think I should offer the guy for the car with all this mystery behind it and what potential it has.
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Old May 28, 2025 | 11:59 AM
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Re: 1988 Camaro IROC

I wouldn't trust any car fax report for these cars. They are way to old and people stopped making insurance claims on them years ago. That being said, how does it run and drive? Mystery doesn't necessarily affect value unless its a rare configuration of options and or build number. Doesn't appear to be the case here. Combo of parts is fairley irrelevant. You want to focus on how it runs and drives, and how must stuff is busted on it. Is the body rotten? Interior smell like death? Need tires? etc etc. To Sofa's point above, its probably a $5k to $9k car. The trip odometer reads 666 so I'm sure its fine.
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Old May 28, 2025 | 12:23 PM
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Re: 1988 Camaro IROC

its probably a $5k to $9k car.
A better estimate than my RWAG, now that more facts have come to light. That's not "a car". It's "an assembly of car parts". Some better than others as usual. Not that that's "bad" per se, just, it means that NOTHING about any of its documentation, EVEN IF some miraculously appears, can be trusted; unless EVERY SINLG PIECE that it's made up out of, can be documented individually.
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Old Jun 8, 2025 | 08:30 PM
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Re: 1988 Camaro IROC

Originally Posted by exiled350
The washer pump is on the wiper motor cover, they moved to the solvent bottle in '88. You can also take the spart tire cover off and there should be a VIN sticker on the quarter panel closer to the front, but still visible with a flashlight. There's one on the other side to but is a bit tricker to get to. There should be a VIN sticker on the underside of the hatch as well.
Did they have VIN stickers in ‘86? I thought GM started that in the ‘87MY? If the windshield VIN decodes it as an ‘86, I would trust that above all else. Interior was swapped with an ‘87 and maybe the engine from the same car. The ‘88+ Iroc-z emblem on rear bumper could be just something the previous owner/body shop added when they repainted it. Rear bumper looks like it was repainted along with the rest of the car.
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Old Jun 9, 2025 | 10:52 PM
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Re: 1988 Camaro IROC

No one pointed out that shifter isn't an 88 either, or even an 87. it's 86 or earlier.
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Old Jun 10, 2025 | 07:53 AM
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Re: 1988 Camaro IROC

These cars are 35-40 years old now and so much can be changed over that time theres no telling
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