The Process West rocker cover garnish was developed to replace the factory plastic garnish when you using an aftermarket plenum (or the Process West throttle body relocation kit).
The factory plastic garnish is designed to accommodate the factory cross over/intake piping set up and leaves a not so attractive finish in the engine bay once these items are removed.
My new garnish is CNC machined from a solid billet of 6061T6 aluminium for a perfect fit. We have also designed the garnish to accept the factory rubber seal that keeps water/moisture out of the coil packs. I can stress enough the importance of keep this area dry for reliability.