I run in the P1, up to 1400cc class here in Canada. The car is very competitive, often beating larger engined cars, we won the under 2000cc production class last year in the western canadian championship.
Car is very strong, never DNF'ed, suspension is custom struts, stiffer springs with VW rabbit bilstein inserts, not sure of the weight, stripped interior but heavy cage + heavy driver and nav! Used a two door shell to save weight.