GRX

Are they D port? Are they basically the same for all years LT1 C4s? Do they have AIR fittings on them? TY.

BlownV6

LT1 in the Corvettes are the exact same engine as in the F-Body.

Anyway get rid of the stock exhaust manifold's for some headers.

Corvette Kid

As far as I know they are all the same in the LTx Corvettes. The F body manifolds have a totally different configuration for that chassis and I don't think they could even be made to work in a Vette. They are inferior anyway. They are D port and they all have AIR ports, on large one per side. If you need a set, they're almost giveaways. A lot more supply than demand.