Let me clear that up, those pictured intakes and exhaust aren't mine, nor is my welding currently capable of that. I only have an oxy/acetylene torch. Tubing and sheet can be welded with it, I'm just better with a mig.
Cost of doing it yourself would be just for the tubing and sheet. Having it done is dependent on the area.
Engine troubles
Moderators: Cal_Gary, T. Highway, Monkey Man, robi