Originally Posted by Tim S

Yes.

I'm in Standard Production > 2 litre in the South East. FI = 1.4 x displacement at the moment therefore 2.8 litre. Next year it will be 1.7 x displacement therefore 3.4 litre, but no real difference to classification.

However...

Standard Production is a silhouette formula, which means no BGWs, no wheelarch extensions, and no non-standard front bumpers. It also means no rose jointed suspension and no stripped interiors.

In practical terms you'd fall into Standard Production and hope no arsehole makes a big thing of your front bumper. This end of the country it's generally OK, as in a bumper is clearly not performance enhancing so why protest? But you do get the odd twat. The best thing to do I find is to find something on their car which transgresses the rules (and there will be something) and let them know you've seen it. Heh heh. Had one all year down here who didn't like my vented bonnet. I'm 5s a lap faster than him everywhere so not exactly competing, but spotted something on his car early in the season I can use to shut him up. Silly but that's how it has to work with some people.