JAK Performance

09/30/2026

I had a fellow member on the BOSS 302 Registry ask me if it were possible to do a single plane manifold for the BOSS 302. I told him when I got a little time, I would see what I could come up with. The results came out pretty good. I placed the carburetor in the same location as the original OEM BOSS manifold. This will allow with the shaker scoop to be retained if your car was equipped. As with my other BOSS manifolds, it has the 3V port configuration. If interested, they will be $2250.

09/25/2026

I received the castings today for 351M/400 2X4 Tunnel Wedge manifolds. They came out looking very nice.

09/19/2026

I got the first three 351M/400 3V Single Plane, Holley 4500 manifolds complete, packaged and shipped. I will receive three 351M/400 2X4 Tunnel Wedge castings from the foundry next week. The price will be $2250 each.

09/13/2026

All of the 2X4 Tunnel Wedge manifolds I have in the shop are now complete and ready to package and ship to the customers. 302W, 351W and BOSS 302. 351M/400 are up next.

09/07/2026

The previous owner of the shop left behind some homemade shelving units. I repurposed them to make four benches and had one section left over. I used it today to build a deburring bench for manifolds.

09/04/2026

It was a busy day today in the shop as I’m finally back on machining manifolds. These are the first run for these manifolds requiring fixture development and manufacturing prior to beginning machining. First up is the BOSS 302 2X4 Tunnel Wedge R and the 302W 2X4 Tunnel Wedge. Tomorrow I will machine the next four 351W Tunnel Wedge manifolds.

09/04/2026

I received the first three castings today from the foundry for the 351M/400. This manifold is a single plane design and features a Holley 4500 Dominator carburetor fl**ge and a 3V port configuration.

08/26/2026

I finally completed the customers’ accessory kit for his Stacked 48mm Throttle Body Injection on top of his BOSS 302. The kit includes a fuel rail to connect the individual fuel rails along with a Holley fuel pressure regulator and mounting bracket, throttle linkage adapter and stack extension.

07/28/2026

Offset distributor parts are coming together.

07/27/2026