I have a used dls stainless steel 3.5" internal waste gate down pipe with test pipe. It fits great and is excellent shape $350 shipped
Heres a pic of it on my car
http://www.gmhightechperformance.com/features/0901gmhtp_1984_oldsmobile_hurst_olds/photo_07.html
Heres a pic of it on my car
http://www.gmhightechperformance.com/features/0901gmhtp_1984_oldsmobile_hurst_olds/photo_07.html