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Identifying
your Corvette T-Top or Roof
This chart and the codes below are
here to help you to identify both the year of your top as well as the glass
code. If you can provide us with the correct information about your top we will
be able to serve you more easily. Derek.
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1968-73:
Fiberglass painted tops
These T-Tops have two clamps, a chrome die cast front guide
pin and a vinyl covered plastic headliner.
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1977: Fiberglass painted
tops:
These fiberglass painted T-Tops were built for
1977 only. They have two clamps similar to the early tops but have
aluminum guide pins instead of the chrome die cast and have a vinyl
covered cardboard headliner.
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1977: Aftermarket Moonroof:
These roofs were originally designed to go on 1977
Corvettes as a GM option although GM never listed them. They were
offered as an aftermarket product and were distinguished by a painted
fiberglass border which surrounded the glass inlet. They were made in
several configurations so they could fit both styles of the C3 roofs.
Colors included: bronze, silver, dark, gold and a rose tint.
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1978-82:Fiberglass painted
tops
The fiberglass tops are distinguished by having
one clamp, a spear in the back and a vinyl covered cardboard
headliner.
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1978-82: Glass T-Tops
The glass tops made for the 1978-82 period can be
easily retrofitted to the 1968 to 1977 Corvettes by removing the
triangular shaped adjustment pin located in the upper rear door pillar
roof panel. These tops were made with LOF brand glass in bronze, blue,
solar cool and neutral tints.
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C3 Aftermarket T-Tops
(1978-82):
These tops were built using LOF,
Galaxy, and PPG brands of glass. Several versions were and are
manufactured using inexpensive Plexiglas.
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C-4 Roofs (1984-1996): Were made
in three styles which fit their respective years only. Were offered
in either painted fiberglass or bronze or blue plastic.
1984 -mid 1986: used a nipple locator in the front.
Late 1986-1988: used a locator bracket with a wide span, one
threaded hole, and two bolts that are 2.25 inches apart.
The 1989-96: use a narrow triangle bracket with a narrower
span, one thread hole and two bolts that are 1.50 inches apart.
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| C-5Roofs 1997-2002 |
There are a few different Corvette t-tops that have been produced over
the years. When customers contact us the first question we usually ask is what
kind of tops do you have?
To answer our question " Which t tops do you
have?" you need to locate the etched in stamp
on the outside rear of the t-top glass where the back of the door glass roll
up. On the glass tops you will see markings like this
All we really need is the M code, in the
above example it would be M-1131 on the lower right. The F/ LX is the date
code on the middle right, the DOT 15 is the US Department of
Transportation number and the LOF logo is the manufacturer.
This particular top the code is M1131
Please ensure that both tops have the same code.
- There are two types of glass used in original Corvette t tops
- Laminated- Like a windshield, has thin piece of rubber sandwiched
in between two thin panels of glass. Problems were it was very fragile.
Normally it does not break but has hairline cracks.
- Tempered- Solid glass panel which is very strong due to the heating
and cooling manufacturing process. Shatters into thousands of little pieces
like a door glass when it breaks.
Corvette T Top codes 78-82 as well as new
replacement tops glass codes.
- M1131- Laminated, Blue tint, came on factory Corvette's from 1978-81.
These tops are rare and expensive.
- M92-A- Tempered, came on factory Corvettes in the year 1982 as standard
glass.
- M94-A- Tempered, came on Collector Edition Corvettes in the year 1982.
- M95C- Tempered , current GM replacement mirrored glass.
- M125C- Tempered, current GM replacement black glass.
- M115- Tempered, blue privacy.
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