thank you.
ok,headers.
i start out with a rough schematic drawing that shows how the pipes will be laid out.
with this particular header design,i have paired pipes so there will be three pairs going into primary collectors.the primary tubes are 1 1/2'',the collector goes to 2''.the three 2'' go to the secondary collector,which is 3 1/2'',this tapers to 3'' where it goes into the sidepipe.
here you can see where i have been fitting up some more tubes.this is the hardest part of the job,as there can be a lot of little pieces that all need to fit perfectly.
i just sort of visualise where i want the primary collectors to be,and start figureing how to snake all the tubes around each other to get there.this one is a little tough because i want these collectors in the middle of the engine,so the back three cylinders need to run forward then turn 180* to get in the right direction.the secondary collector will be at the frame at the rear of the motor,close to where the brake line is sitting,and be much easier to run the three 2'' tubes to.