Grimmspeed Stage 1 Power Package - 15-21 Subaru STI - 191013 100F-300F A013 pressure plate features an

A013 pressure plate features an exclusive diaphragm design to increase clamp load

you can either purchase the 15-17 post MAF hose and GrimmSpeed Sound Plug Delete

HY4-HDR6 kit features ACT's most popular Heavy Duty pressure plate

where additional cylinder head clamping force is needed

GrimmSpeed Intake Kit Includes:

Grimmspeed Stage 1 Power Package - 15-21 Subaru STI - 191013 100F-300F A013 pressure plate features anThe beauty of the GrimmSpeed Staged Power Packages is that all of the included components were designed and tested to work well together as a complete system. Instead of piecing together parts from many different manufacturers and hoping that they're design theories are compatible, consider starting with one of our excellent Staged Power Packages based on your goals! The GrimmSpeed Stage 1 Power Package is an excellent place to start when modifying