Built for ported heads and real track work, the GSC R2 profile drives the GT350 Voodoo Flat-Plane hard to 8,300 rpm with a usable band from 6,000–8,500 rpm. Events are modeled for Voodoo heads flow behavior and correct rocker geometry for high-flow combinations, then cut from our U.S.-made forged billet blanks and finished with BLACK ISE for reduced friction and long life. Runs on pump gas, race fuel, or ethanol blends (E85/E90).

Highlights

• Profile intent: Ported head race profile; optimized for higher-flow combos and serious track use
• Fuel: Pump gas, race fuel, E85/E90
• Peak power: 8100-8,300 rpm · Powerband: 6,000–8,500 rpm
• Valve springs: Upgrade required (use GSC-matched springs; Ti retainers recommended)
• NA Setup: For best performance use with an aftermarket intake manifold 
• VCT: Tuner-managed phasing window recommended for best area under the curve
• Manufacturing: MADE IN THE USA; forged from proprietary U.S.-sourced bearing-grade steel, BLACK ISE surface treatment, CNC to tighter-than-OEM tolerances
• Fitment: Voodoo heads with Gen 2 timing and Mustang Flat-Plane firing order

Tuning & Install Notes

• Clearance: Always verify piston-to-valve clearance with your exact heads, pistons, and gasket stack. With OEM pistons and deck heights, the full phaser range is typically usable without clearance issues.
• Use upgraded valve springs (and Ti retainers) set to the tuner’s rev limit; check installed height and coil bind.