shorties are the stock size headers as far as where they mount, they come in equal and unequal lengths but that only refers to the actual length of each primary tube, they both end up to the stock collector location. Long tube headers are physically longer where the collector meets so a stock h-pipe wouldn't work and you need a short h-pipe.
So to answer your question yes a stock h-pipe will work with your shortie headers.
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, builds, modifications, reviews, engine swaps, classifieds, troubleshooting, maintenance, and more!