Mazdaspeed parts usa2/2/2023 ![]() Even on a stock turbo car with no additional tuning and simple bolt ons the intake manifold produced an additional 8hp/11ft-lbs and drivability was improved greatly. You can see for yourself in the collection of test result graphs in the pictures section. Radiused inlets are CNC machined into each plenum bottom to improve airflow by 10-15%.Įxtensive testing was done on various setups and improvements were made in every aspect. The lower half is completely CNC machined from billet aluminum. This manifold was designed to not only look awesome but to perform even better.Įach manifold is hand made and TIG welded from high quality 6061 T6 aluminum. Finally, JMF is showing some love for the Mazda community! With over a year of research and development JMF is proud to introduce the first sheetmetal intake manifold with port injection on the market for the Mazda Speed cars.
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