Hello, I have acquired a set of 403 catcams. My plans are to port the head, upgrade the valves and valve springs along with possibly changing the rods with the intention being to increase the power whilst keeping the engine reliable. Just wondering if there's anyone else out there running the 403's that can give me some advice on their setup and what they would suggest going for?
403 catcam engine build
- Thread starter Lovell
- Start date
