Last bike i built made 9 hp more with shear than CPI both OOF big bores same time dyno pulled one set off put the other on same jetting.
I have found that alot of cylinders do not line up well with pipes, different brand pipes and cylenders all fit differently, I use spacers behind the pipe mounts to adjust the pipes to fit cylinder flanges, getting a good fit helps with vibration and to get the pipe to seal on the flange also.
I was skeptical about ridgid mounts but I am sold now pipes have not cracked or broke and mounts are in perfect shape, nice polish and look good..
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