Does anyone know of any good power upgrades for the 27pd? Also a good exhaust system. Any info is appreciated thankx.

We have mufflers and some carb upgrades for the Kohlers.

What kind of power increase we talkin bout with an exhaust and carb upgrade? Are the exhaust stainless? What about head work?

10-15HP increase with a Stage I. Mufflers are stainless and we do the head work as well.

What does the stage 1 consist of,and what kind of price im lookin at? Also how does it effect the reliability and start up?

We have multiple types of upgrades to make that PD faster. You have a good variety to choose from depending on how much you want to go. A modified stock carb, exhaust and filter system will pickup a ton of torque and 3-4 MPH and the price is real reasonable. But you can also go with a Mikuni carb if you want. We make a killer stainless exhaust system as well.
If you need more than that, you can go with some head upgrades that will boost it more.
If you would like to get some more specific info regarding a program for your PD, email us or give us a call at the shop. Our number is 863-858-3338.
Thanks