This is the exact downpipe from our LNF Turbo Upgrade and LSJ Turbo Swap Kit. This downpipe is intended for for use with our wastegate recirc fabrication tube, if you want a pre-made recirculated wastegate/downpipe you would have to purchase the entire turbo kit with the recirculated wastegate option selected. This is intended to bolt up to our Bullseye turbo with V band exit, and Ecotec turbo manifold. Please select the correct downpipe exit flange for the downpipe.Our downpipes come with a high flow catalytic converter that is 48 state legal. Our catalytic converters will not pass California or New York state emissions. Please contact customerservice@zzperformance.com if you have any questions. Tech support on building your own kit is NOT available.