Supertech Complete Valve Sets for 1994-2005 Mazda Miata 1.8L

Standard Hi-Flo Kit (Better):
Our Standard Hi-Flo kit is one step up from the standard kit and uses OEM valve diameters, however the intake valves have a specially designed "hi-flo" valve stem to increase airflow. It uses the same exhaust valves as the Standard kit. The kit includes:

Oversized High Flow Kit (Best):
Our Oversized High-Flow Kit uses 1mm oversized valves which will provide a higher volume of air to be pushed through the cylinder head, in turn providing or supporting increased power levels. Boosted engines would benefit the most from this, however increasing the cylinder heads volume is never a bad thing for a naturally aspirated engine (especially the Miata's, which has never been a head known for good flow). Please be aware that an oversize valve will require appropriate machining to the head to allow for a larger than standard valve! This kit includes:

High-Boost/High-Temp Oversized Kit (Turbo/High HP):
Our high-boost/high-temp kit is designed for high-boost turbocharged engines which would incur a higher than normal heat load. This kit uses inconel exhaust valves, which have a higher heat tolerance than the standard stainless steel valves in the other kits. For intake valves, it uses the same oversized high-flow valves as our Oversized High-Flow Kit. Please be aware that an oversize valve will require appropriate machining to the head to allow for a larger than standard valve! Kit includes:

Valve Information and Specs:

MAIVN-1208 (std flo) Black Nitrided Intake Valve

MAEVN-1204 Black Nitrided Exhaust Valve

MAIVN-1204 (hi flo) Black Nitrided Intake Valve

MAIVN-1206 (hi flo) Black Nitrided Intake Valve

MAEVN-1206 Black Nitrided Exhaust Valve

MAEVI-1206 Inconel Exhaust Valve