The Ferrea Comp Plus exhaust valve set for Nissan TB48DE engines is specified for turbo applications and supplied as twelve valves with 33.5 mm head diameter, 6.96 mm stem and 98.3 mm overall length, shown with a 20° flow profile. Sold as a set of 12 for TB48DE turbo applications, these valves match the dimensions and profile listed for that engine.
Ferrea Nissan TB48DE 33.5mm 6.96mm 98.3mm 20 Deg Flo Stk Comp Plus Exh Valve - Set of 12 (Turbo App)