i dont know, i doubt it, i think the engine RPO was only LG4, but the car is very much stock, other than a catback and lowering springs. i'll have to check under it and see the front flange of the cat, if its a slip fit, its lg4, 4 bolt flange is a L69. I installed the different lights all around. I dont know why anyone would put a dual snorkel on it if it wasnt though, but who knows. The car has 186k miles on it and the body is wasted. I'll be swapping most of the parts to the 89 iroc shell and at that time, dropping in a '89 305 i have.