Hi folks,

Recently put in Fueling 574 Cams, ported heads with a .030 head gasket along with a 50mm TB on my 103" Street Bob. I had my Supermeg set with 20 discs and closed end cap. Bike produced 105hp and 100tq where most others with similar builds were a fair bit more. The tuner thought that perhaps the pipe was a little restrictive. The HP does climb pretty quick right to the end but starts much lower up to 4k than what it should. I'd like to play with the disc setup to get these numbers moving in the right direction if possible. I do own an open end cap but do not currently use it. Any thoughts as to where to start?

thanks!