ACT Mazda MX-5 Miata HD/Perf Street Sprung Clutch KitZM5 HDSS kit features ACT's most popular Heavy Duty pressure plate and most popular street disc. ACT Heavy Duty pressure plates use exclusive diaphragm design to increase clamp load, reduce deflection and maximize clutch life. All diaphragms endure a four stage, heat treating process for unparalleled performance. ACT pressure plates have precision cover stampings to provide rigidity and consistency. ACT's Performance Street discs feature premium

more aggressive sound

As the importer

Includes -4AN oil feed fitting and -6AN coolant/water fittings

you don't have to buy them in red

and the internal diameter of the turbo inlet

High-efficiency dual-pass core

TUNING PROCESS

Combined with the Touring Edition Exhaust

THE TURBINE DOESN’T NEED TO RECOVER AS MUCH POWER FROM THE EXHAUST STREAM TO PRODUCE THE SAME BOOST AND THUS THERE IS LESS BACKPRESSURE

Later multi-valve engines are also fit with cam triggers to make sequential fuel injection and ignition possible

The filter is constructed with our signature flow cones to aid in the Venturi housing principle

The internal diameter of each silicone is precisely matched to the inner diameter of the ribbed intercooler inlet and outlet connections along with a unique Flush Fit design