I have a Orion .24 Alpha in my SC8, 086 pipe and an 18T clutch bell. Def. needs the 44T spur as opposed to stock 46T. The .24 makes it scoot, trust me. I was going to get the OS .25xz, but as fate would have it I found the Orion .24 on sale, so I grabbed it instead. The .24 has been discontinued, but you can still find them. It was replaced with a .22 version. You dont need some monster .32 stump pulling hog, a decent .21 will make the stock .28 look silly.

I've been told to go with a 2058 pipe, as its better all around, or a 2013, depends on your track I suppose. Get aluminum clutch shoes if your still running the stock clutch also, you'll have better punch with the added power of your new engine.