Engine used in 1984.

Engine used from 1985-1991.

The GM designation for the 5.7 liter, (350 cubic inch), TPI motor. This motor was used in other GM vehicles, but was used in the Corvette from 1985 to 1991.

This is data compiled by CentralCoaster. It lists all the bolt sizes for a stock L98 intake manifold and some of the attachments. These are commonly replaced with allen head bolts and are easier to remove. ================================================== TB = (4) M8x70 Throttle bracket = (3) M6x12 Distributor cover & TB plate = (9) M4x12 Intake base = (12) 3/8-16x1\" L98 Tstat = (2) 3/8-16x1.25\" EGR = (2) 5/16-18x1\" Perimeter VC\'s = (8) 1/4-20x1\" centerbolt VC\'s = (8) 1/4-20x3.5\" Top of runners into plenum: (7) M8x30 plus the special bolt with throttle cable holder. Bottom of runners into intake baseplate: (4) M8x55 underneath each runner pair between tubes. (6) M8x30 at each end of the runner flange, and one in the middle (2) M8x40 go into the backside of the runner flange, you have to do these from the opposite side of the motor. Fuel rail: (4) M8x35 bolts from the top (2) M8x20 on the little flange in front of the intake.

Metric unit of measure. In the case of engine displacement, it measures the total volume of all combustion chambers. Therefore in a 5.7L V8, each chamber is 0.7125L. 1 liter = 61.0237441 cubic inch

Limited Production Option

Engine used from 1992-1996 (in 1996, automatic equipped only).

Engine used in 1996, all manual equipped cars came with this engine.

Engine used in the ZR1, 1990-1995, manual only.