I agree with Paul. I wouldn't mind learning a few tricks on how to upgrade the power and torque on the Isuzu diesel. I'm not interested in doubling the horsepower, but wouldn't mind getting it increased 10-15 horses. What about a header for the C223, I would be very interested to upgrade with that, a 2.5" exhaust, and a performance MagnaFlow muffler all the way back. I know a header is not available, but I wonder how much one would cost to be custom made?? Sometimes I sit and think that it's just not fair that all the gasoline engine options have headers available, but when you go to any 80's Japanese diesel pickup a header is nowhere to be found.

The only thing I have done to upgrade my 82 LUV diesel is put on a K&N air filter, but I had planned to put on a larger exhaust ever since I got the truck.