I have a 98.5 dodge ram with 200,000 miles on it how many miles is my stock turbo good for ? If I buy a after market turbo what size should I get

 

need a lot more info for advice on a turbo. As for yours its probably still good if its been taken care of.

 

my truck is pretty much stock except for air dog fuel pump and 4" exhaust I would like a turbo close to my stock turbo I do plan on installing new injectors( rv 275) for better fuel mileage and a little more hp

 

If you wanna keep the fuel addition low, (rv275's) stay with a smaller turbo too.
If your worried about your turbo, you could start easy and cheap with a turbo rebuild kit. Ive heard of some guys seeing night and day dif from rebuilding theirs.

You have an HX-35 so its a good turbo already though. If your having no problems, its prob fine.
If your just dying to get a toy, Id suggest a HX35-40 hybrid. Pretty cheap compared to bigger turbos. And spool and whistle like a dream with few mods. I almost miss my hybrid... till I hit 8 lbs and hear the s475 start to spool

 

Your turbo is fine. Staying near stock power and not going 1600*egt's the HX35 will last over a million miles. The guy with the 01' 24v that has 1,700,000 miles on the original motor is still running the stock turbo. Supposedly anyway.