i looked at the parts on the ebay turbos, it claim to be able to work with the p5 as well as a couple other cars this is a list of what the kit contains
# INTERCOOLER:
# Size : 28" x8" x 2.5" With 2.5' Inch Inlet/Outlet.
# Low Pressure Drop - Large Cooling Area - Easy Install - Tube And Fin Style Intercooler.
# PIPING KIT:
# Made of 6061 Aluminum. 2.5 inch Diameter Piping Kit With High Quality Silicone Couplers And T-Bolt Clamps.
# The Couplers Will Not Split Easily + The Clamps Will Not Strip Like The Cheap Kind.
# Strong & Tighter Fitting Use Hair Spray Between The Pipe And Coupler.
# Mandrel Bend 2.5 Pipe(As Shown As Picture) For High Flow And High Horse Power And Better Turbo Response Power.Some Cutting And Modification Required!
# 38MM WASTEGATE :
# All Stainless Steel hardware, Mating weld flanges are 304L.
# Spring Size is 7 PSI.
# BOOST CONTROLLER:
# Allows Adjustable Boost PSI Settings, Light Weight Design To Be Mount Under The Hood. Hardware Is Included.
# Manually Control turbo boost up to 30 PSI.
# OIL FEED LINE:
# 100% Brand New, High Quality, Never Been Used Or Installed!
# The Oil Feeding Flange has Restriction build in, offers proper Oil Feeding to the turbocharger.
# The Length Is 37 Inch.
# TYPE-RS BLOW OFF VALVE BOV:
# CNC Billet Aluminum, Dual Stage Handle, High Boost Power,Easy Mount Piping Set Included For Bolt-On.Including Bov Blow Off Value Flange.
# Fast Fesponse One For Low And High Boost Pressure.
its basically my attempt to be as cheap as possible but get at least 170whp. manifold is about 150, couldnt find a downpipe though