This relocates the return to the bottom of the reservoir, and these reservoirs aren't prone to swelling and leaking like the -2004 style that are found on P80 and early P2 models. The included suction hose to the pump is all you need to swap to this style, the stock P80 return hose reaches just fine. I recently installed one of these on my car, and it looks WAY nicer. Not to mention the lack of leaks!
$45 shipped in the US. International shipping available for additional cost.