Internal waste gates work just like external, you control the boost level by using a controller on them.
this one is internally gated and even has a one year unlimited mile warranty. only $400
Amazon product ASIN B01J92WMZUView: https://www.amazon.com/dp/B01J92WMZU/ref=sspa_dk_detail_7?psc=1&pd_rd_i=B01J92WMZU&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=1713835751726239774&pf_rd_r=QW41A2MRBM85XQ733CJX&pd_rd_wg=4d4ku&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&pd_rd_w=LamcG&pf_rd_i=desktop-dp-sims&pd_rd_r=3a21a8ba-83df-11e8-8547-adee3c727b5c
this one is internally gated and even has a one year unlimited mile warranty. only $400
Amazon product ASIN B01J92WMZUView: https://www.amazon.com/dp/B01J92WMZU/ref=sspa_dk_detail_7?psc=1&pd_rd_i=B01J92WMZU&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=1713835751726239774&pf_rd_r=QW41A2MRBM85XQ733CJX&pd_rd_wg=4d4ku&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&pd_rd_w=LamcG&pf_rd_i=desktop-dp-sims&pd_rd_r=3a21a8ba-83df-11e8-8547-adee3c727b5c