What model jake heads are these?

I bought complete used set of 346D from Midwest Diesel last year. Very fairly priced. They also had brand new 346D surplus kits. Cat/Jacobs no longer offer replacement housings.

 

How do you like the braking on the d? I’ll def check them out. Thanks.

 

What was the price roughly if you don’t mind me asking. I’ll be paying in cdn. ‍♂️

 

I could dig up the receipt, but with shipping was around $1450.00. I bought tune up kit and the control group (wiring and all switches) @ local KW dealer through Paccar parts a using Jacobs P/N saving money vs using Cat P/N's. Truck is a hobby truck, so all parts I inspected,coated with rust preventive, put in storage containers.
Your picture looks like the 349 series Jake. I asked about them when I bought mine and salesman said it is very rare to find a pair of housings that didn't have at least one worn piston bore on those. The 349's had 30% more braking HP @ 400 braking HP.