Effects at higher speeds...??? If you feel like you are losing power you can add some lollipops (search) and help reduce loss of back pressure.
Sorry, did not do any major picture taking of making the exhaust, but it is pretty "cut and dry" (pun intended), all you have to do is cut the giant tube off and then weld or use self tapping screws to attach the exhaust tips and wrap the pipes. Ain't nothin to it but to do it.
Then the prophet Isaiah called on the LORD, and the LORD made the SHADOW... 2 Kings 20:11
Okay, I know it's a little out of context, but still we have proof that God created the Shadow!!!