Designed for 86 and earlier 262-400 small block Chevys, the Performer EPS dual plane manifoldĀ is optimized to deliver superior performance with Edelbrock Performer or Thunder series square bore carburetors . It has a runner design that’s tuned for for peak torque around 3500 rpm and it’s ideal for power from off-idle – 5500rpm. Dyno tests have shown gains of 5hp and 9ft/lbs of torque over the 2101 model.