Exhaust Valve, 28mm, Stainless, Predator Item Number: SI-R-15 Price: $16.45 Add to Cart Description This is a 28mm stainless steel exhaust valve for the Predator engine. This is a dished valve. This valve does not fit the Predator Hemi. Accessories 32lb Dual Valve Spring Set with Hardware, Clone 28.5MM Intake Seat, Clone