This is a crate motor utilizing the SE Pro Cases. Just an FYI. Just a post on my 124. Noise in lower end ~ called S&S and they recommended Cycle-rama in Pinellas Park, FL. Took it to Wes. Diagnosis, the idler gear bushing was wearing and the noise I was hearing was the Idler gear moving around in the camplate. No loss of oil pressure or performance just alot of noise, and I could not isolate it. Wes called S&S they are replacing lifters, camplate, oilpump and the cam chest cover. Wes stated the 640 cams were fine. About 6k on the motor but the noise had gotten louder with time. I had pulled the crank position sensor and there was no metal so I felt like the cam chest was the most likely offender. Love the motors power, and hope moving forward for a bulletproof 124. I guess only time will tell.