Ok, since you showed an intrest in my exhaust here's the skinny.
Kerker Headers started teaming up with SuperTrapp way back in the day. Now if you search Kerker Exhaust it takes you to Supertrapps websight. SuperTrapp purchased Kerker in 1991. So now they are one in the same.
I was originally searching for any 4-1 header, Yoshi, Jardine, Vance & Hines, or Kerker... were the names I knew. When I found this one over on theGSResouces.com I discovered they used SuperTrapp mufflers back in the day. I was familiar with SuperTrapps muffler design from my Automotive Gearhead experiance and knew they were TUNABLE.
This one was used, nice chrome on the muffler, the hearder tubes were rusty but no dents at the down tubes bend that is so common from bottoming out... Think I paid $100 for it.
Next I covered the muffler with a garbage bag and taped it up with duct tape then sandblasted the rusty chrome on the headers. Wiped it down with rubbing alcohol and sprayed it with Rustoleum's "Ultra" Bar-B-Que paint. Once you let it cure while the build continues. Once ready you can start the bike in short runs, letting it gradually get hotter each time after full cool down periods. This fully cures the paint.
The nice thing about a SuperTrapp is the are tunable as mentioned earlier. You can change the amount of discs to get the desired power range. Less discs increase back pressure, low-midrange power and a quite tone. More discs gives less back pressure, higher RPM power and a louder tone. But too many and it is "peaky" and bottom end suffers. Great for the track but there is a happy medium for the street. Mine came with 5, and the end cap you saw. I bought an extra pack of 5 discs that are still available new and wound up with using 8.
