Overview Reviews Product Description Manley?s Race Series valves are meticulously engineered to meet the rigorous demands of bracket, drag, and oval track racers and are the ultimate choice for engines operating under 8000 RPM Product Videos Custom Field Product Reviews Write a Review Write a Review × Manley Performance Manley 16 Intake 34mm Stainless Race Master Valves for 90-99 Miata 1.8L (BP056) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *