The box at the end of fabrication. It has fine thread 1/4" bolts here but it took forever to get them out and in so I later welded in some coarse nuts. I also had to add a 2 1/2" disc under the center bolt as the boost was swelling the lid up and threatening to pull the bolt head through. See the nice neat vacuum distribution on the side? The odd shape of the box is to clear various stock items egr, throttle cable, fittings, etc.

Owner caption September 2007 · Photo 4 of 429