I've got a 1991 6 speed coupe that i' ve added flowmaster mufflers to along with K & N filters, Performance Resources Chip, Split Fire plugs, TPI plug wires, air foil,and a fuel pressure regulator. I also use Mobil 1 in the entire drivetrain. It's actually gone from being quick to being fast. I would be courious as to what other L-98 owners have added and the results.
Especiallly the chip, mine made a big difference, i do not know if i got the 7/10th that was advertised but it was a seat of the pants difference. Any experiences with this brand of chip?