Well I needed to pull the engine this winter for some work I was going to send to Keithcraft, but the opportunity came about after the engine was at their shop and Lance/Keith gave me the option. I wasn't planning on it, but jumped on it after talking to many of my local Cobra buds (thanks Clois). It's only money right?
The exhaust diameter is interesting. I know many guys run the SBF 427 with the standard pipes from Backdraft and never heard of this like most stuff.