For compatibility questions, I find the Deroure cataloge very helpful. This shows three different part numbers - non-sc, Exige sc, and Elise sc. Now, are the differences important? That's a different question, and probably not black-and-white.Does anyone know if the OEM CAT from the Exige S2 fits the Elise S2 without any modification? I've tried digging around but couldn't find anything. Thanks.