Top Street Performance 8" SFI Certified Gloss Black Harmonic Balancer for Chevy Big Block 396-427

Top Street Performance high rise air gap performance dual plane intake manifolds performs best with high lift cams, tubular headers, and high flow heads. With large plenums and open runners that are raised above the valley allow for a cooler intake charge that will products more power. These manifolds give more top end power thank a stock dual plan manifold. Performance gains from 1,500-6,500 rpm make this manifold a great addition to your bracket car or weekend racer. Manifold features four corner water outlets, nitrous bosses, and dual distributor hold downs.

• Fits Chevy Big Block 396, 402 and 427 Mark IV harmonic balancer applications
• 8.000 in. gloss black internal-balance steel elastomer damper for BBC performance builds
• Controls crankshaft vibration and reduces harmful harmonics for improved durability
• SFI 18.1 certified with 60° BTDC to 0° TDC timing marks for racing use