This thread discusses the Content article: CC Racing Steel Pipe

Great pipe. Just a tip here from my tuning with one....they like to be long. 11-3/4\" to 12\" from center of flange straight back to the 'weld'.

11-3/4 is right where mine ended up also.

so by flange i gess you guys mesureing from the eaust water head oring flange im gessing. also . have i got it right , that shorter pipe is more torque and longer pipe is more revs , and have pipe able to tune from 11-1/2 in to 13 in lenth from head of motor to senter cone of pipe. ive got mine set ruffly at 12 or 12&1/2....

vid of boats out on lake mine is the 50in orange/yelow/holografic one. white hull is a mates 66 inch running 2 rmck 25cc motors. both boats out on second days run from being built.. mine cost me $900. to build ..mates cost over $3000 to build.....

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By flange we mean the water-cooled flange that bolts to the engine exhaust port.

Shorter = tunes at higher rpm Longer = tunes at lower RPM (generally giving more TQ)

A better way to measure is to follow the center line of the header and pipe starting at the outside face of the flange. You should be in the 12.5 to 12 3/4 range. This is a good starting point for the CC steel pipe.