Them aftermarket chambers

[soonerbillz]

Never envisioned this manufacturing technique.

https://www.facebook.com/share/r/jKe1oTJgvNF5w5Mp/?mibextid=14AR8G

[Evans Ward]

Wow!   

[svgarage]

Yup. And that's a good living.

[IR8D8R]

Hydroformed or stamped in halves and seam welded. FPPs were made like that. Technically should result in a better finished design than cones. Requires less skill in the assembly than pie-cut tig welded sections that have to be clocked just right.
 There is a lot of expense in the forming equipment. Die making is very costly. It was an art before CAD and CNC. Then it's a shame that FPP scrapped their dies. If they even owned them. Could have been a contract production job.

IR8D8R

[pdxjim]

FPP stamped pipes for a few other brands, including the Moto Carrera millennium pipes. They are still in biz stamping out PWC pipes in Ukiah, CA.

[Brad-Man]

The Pro-Flow pipes I have for my RD are hydro formed...

[pdxjim]

The Pro-Flow pipes I have for my RD are hydro formed...

Do they have the Pro-Flow logo embossed in the side of the belly like others I've seen?  If so, they're probably stamped.

[Brad-Man]

The Pro-Flow pipes I have for my RD are hydro formed...

Do they have the Pro-Flow logo embossed in the side of the belly like others I've seen?  If so, they're probably stamped.

You may be right...