firstvette99

what years could you get the lt4.how can you tell if a c4 has this option. thanks

CDN/AZ LT4

Only in 1996 models...if it's a 6 speed standard, 1996 model, it's an LT4.

Joe C

...that would be my answer - 96, manual transmission.

RetiredSFC 97

there's an LT4 decal/emblem on the back, right IIRC.

VetteMed

Wrong. Not from the factory at least.

dukeallen

Weren't there also 6 speed LT1s?

96 lt-4

Yes.6speed lt1's from 92-95.Maybe 96 as an option??Every manual trans 96 I have seen is an LT4.
LT4 was an option on 97 trans am/z-28 also.Very rare but was available.

VetteMed

Any factory ordered 96 with a manual, got the LT4. If you find a 96 LT1 with a manual, then somebody changed something over at some point.

The f-bodies with the LT4 were done by SLP, if I remember correctly. Only a couple hundred made.

Jimbo 89

LT4's also have an 8,000rpm tach (6,300rpm redline) compared to LT1 6,000rpm tach (5,700rpm redline).

RollaMo-LT4

Only from '92-'95

As others have mentioned, all manual trans '96 cars were LT4

6-speed = LT4
Auto = LT1

No auto tranny LT4 cars, unless they've been converted.
And there are a few of them out there. One forum member here has one.

If you want to prove if a '96 is a factory LT4, look at the 8th character of the VIN.
P = LT1
5 = LT4

corvetteronw

Good info here:
http://www.grandsportregistry.com/lt1vslt4.htm

StealthLT4

Everything above is correct. Red intake manifold, 8k tach, Vin 5. 6spd in 1996=LT4.

mtwoolford

don't forget the 'GRAND SPORT' emblem on the throttle body.

B17Crew

A few things to add to the list:

Under car
- Stock LT4 exhaust systems have a crossover tube on the exhaust. Look just ahead of the spare tire carrier. LT1 did not receive the crossover tube

Engine compartment
- remove engine oil fill cap
- LT4 should be stamped into the head (may need a flash light to see it)

If you’re looking for a LT4, enjoy the hunt!

B17Crew

pappy.72

I notice mine by how much faster it is than the LT-1...Ha. Also if you look under the oil cap you can see the different rocker arms.

corvetteronw

Couple of pics from the NCM:


http://im1.shutterfly.com/media/47b5...D720/ry%3D480/

96 lt-4

LT4 came stock with Crane sourced 1.6 roller rockers IIRC.

Paul Workman

Did NON GS cars have a "Grand Sport" plate on the TB????

P.

B17Crew

All LT4 optioned cars came with the ”Grand Sport” TB cover – regardless if it was a GS or a CE.

B17Crew

primalurges

Easiest and surest way is too look inside the oil fill cap, LT4 will be clearly stamped right in the center