I have the FireFlyPermormance sidepipes mufflers with the 3" hole - real loud and the first set of SS headers, 2" tube built for AFR 225s. These are now being built with 1 7/8" primaries which is probably better for most small blocks unless you have big cubes and run high RPM.
Contact Ron Roberts
http://www.fireflyperformance.com/
Headers for SBF and other and sidepipes for all SPF MKIIIs
Not cheap but excellent products.
Jim
RDI AL-427w, AFR 225, Vic Jr., ProSystems