C15 help

For a radiator you could try these guys

Detroit Radiator Corporation Heavy Duty Truck Radiators, Radiator Cores, Charge Air Coolers

If your engine is still bone stock, I think there is a better flash file for your ecm and turbo upgrade to gain more power and mpg.
@superhauler or @swaan @rollin coal would you guys have any recommendations?

 

Yes they will get back to you. I would call them, they are super nice and helpful. They will want to know a part number on your old radiator so they can narrow down which one you need. There is different inlet and outlet tube angle and sizes. If you can't find a part number just call Kenworth with your vin and call them back.

 

Not to badmouth anyone and maybe there quality has changed as of recently. Stopped using Detroit radiator years ago due to repeat tank sealing issues at the cork seals. Seamed like every one would come back inside a year. Yes , they were taking care of under warranty, but not the labor. Big job to do all over again. Finally gave up on them.

Try these-http://www.roppelrad.com/contact_us.html

I personally would go CAT on the turbo.

 

You might want to compare prices with your Kenworth dealer. When I checked on a radiator for my T-600, local KW dealer was cheaper then Detroit radiator so I ended up going with them and they also had it in stock.

 

I don't have any experience with them(Detroit radiator), @snowman_w900 recommended to check them out as he bought a radiator not to long ago from them and was happy with the results, but I ended up going local with a radiator cause they were cheaper and was in stock.

I did talk to Detroit and were super nice to chat with. They would do 7 year warranty on a radiator and was a 4 row.