I was at my LHS and way in the back I found a plastic back with a pretty cool looking tuned pipe. The bag said, "Irvine .40". I brought it up front and it will fit my Irvine .53. The whole in the header wasn't as wide as the exaust outlet on the motor. The LHS dealer said he would take a file and open the hole up for the .53. He said this was a pipe that was made by Irvine and I got the feeling they didn't make them anymore. He only wanted $30 for it and it looked like it might be a good thing. The whole thing was silver with what looked like a header pipe that went into a tappered cylinder. I'd say the whole thing was like 7 or 9 inches long.
Anyone know of this? I'm tempted to buy it since it's cheap and made by Irvine. Since it's for a .40 I thought it might make some good low to mid range torque for me. I'm just speculating though.