GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - SET 8

The GSC Power Division 2003-8 is a set of eight exhaust valves designed for high-performance applications. These valves feature a +1mm oversized head diameter of 31.5mm and are constructed from modified 23-8n stainless steel for high heat capacity and longevity.

Key features include swirl-polished heads for improved airflow, a back cut to reduce weight for higher RPM and boost, and micro-polished stems for reduced drag. The valve tips are hardened or feature a stelite wafer tip for extended wear, and tip heights are adjusted to minimize installation time and maintain proper valvetrain geometry.