Porsche 911 CIS Airbox

Why CIS?

After rebuilding my entire engine from the ground up, why on Earth would I stick the stock Bosch CIS K-Jetronic fuel system back on?

Porsche 911 Chain Housing Components

Porsche 911 Timing Chain Housings

After assembling the heads and cam towers, the next major components to be added to the air-cooled flat-six sandwich were the timing chain housings.

Porsche 911 Long Block Overhead

Porsche 911 Heads and Cam Towers

While I was assembling the pistons and cylinders, I sent my cam towers to my machine shop to get cleaned up, drilled, and tapped for threaded spray bar plugs.