42 Edelbrock Manifold Performer Eps SB Chevy Vortec Black Finish. Edelbrock part #27163 Performer EPS Vortec intake manifold is now available for small block Chevys with Vortec or Edelbrock E Tec cylinder heads. The Performer EPS dual plane manifold is optimized to deliver superior performance with Edelbrock square bore Performer Series or Thunder Series AVS carburetors. The runner design is "tuned" for peak torque around 3500 rpm on a 350 inch engine and it's ideal for power from off idle to 5500 rpm. Dyno tests showed gains averaging 5+ ft lbs. of torque from 3000 to 4500 rpm for more performance where you need it most. Match with a dependable Edelbrock square bore carburetor for maximum performance gains. Will not fit under stock Corvette hood. This manifold offers a durable black power coated finish for long lasting protection and a distinctive look. Warranty Dual Plane Low Rise Intake w 180 Deg. Firing Order