Pontiac Cylinder Head Packages - Cylinder Head Symphony
SD Performance has offered ported D-port castings at an affordable price for several years, but only recently has the company begun using a CNC mill to perform the port work on most any D-port, including low-performance, small-valve castings with prices starting at $1,195. Like most others in our story, this particular casting is shown disassembled for photographic reasons, but would otherwise arrive completely assembled, and ready to bolt on. View Related Article
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