Installing a GrimmSpeed Downpipe | Show + Go STI Build Ep.2
We partnered with Grimmspeed to unleash the full potential of this EJ257! By installing a high performance downpipe we hope to free up some hidden horsepower and unleash some sound.
We partnered with Grimmspeed to unleash the full potential of this EJ257! By installing a high performance downpipe we hope to free up some hidden horsepower and unleash some sound.