The BPS Evap Fitting is intended for those installing 2013 TVS's on their 07-10 GT500. The 07-10 GT500's use a different plug in system for the Evap which requires users to fabricate a fitting using plumbing fixtures and threading the Evap hole in the elbow. We went ahead and developed our billet fitting to make everyone's life easier. Saves you the hassle and saves you time, simply slide it in with a drop of loc-tite or sealant and plug it in! These will be available and ready to ship May 31st.