'Both ERA and SPF don't come with many items that are standard with the CSX such as pin drives ($2,800.00 extra on the ERA and I don't even think you can get them with SPF), aluminum panels for engine bay and trunk, outboard brakes (extra on ERA), roll bar (extra on ERA), fuel cell (extra on ERA), pusher fans (extra on both), remote oiler cooler (extra on ERA, not sure about SPF), roll bar (extra on ERA), leather (extra on ERA).' Evan's quote.
Hal replies: actually, for years SPF's have come with Knock Off Pin Drive wheels, used to be Trigos, now a similar wheel by SPF. SPF's have polished stainless steel heatshields on the footwells in the engine compartment, and brushed aluminum engine compartment firewall. comes with the ducted
oil cooler and lines, roll bar (several variations), sidepipes, headers to match the engine, heaters, defrosters, Wilwoods, full leather seats, interior vents from the front to air the footwells, Smiths's, ducted rear electric fans (some folks have added the pusher fans for the looks). Trunk is carpeted. Hood and trunk fully finished on interior of lids. Stainless steel baffeled 17 gal tank (cells are available), big aluminum radiators, etc
Anyway, just to clear up any ambiguiity about some of the SPF standard features. The SPF dealers can put much more on them , if one wishes to race, etc. There is not much to option on an SPF, unless one wants lots of chrome, or to race, basically add the motor, trans, battery, driveshaft, and fluids.