Just saw this announced by Crawford Performance, basically:
"our BPB sandwich between the cylinder heads and the intake manifold to create longer intake runners. The lengthened intake runners enhance the volumetric efficiency of the engine which translated into an increase of 19 Horse Power, 15 Pound Feet of Torque and narrowed up the torque dip by 300RPM on a totally stock (GT86)."
How exactly does this work? I'm trying to picture it. $400 for +19hp?
http://www.crawfordperformance.com/p...er-blocks-bpb/
