MSDS is the only real header manufacture since Sean Highland dropped out of making Tour parts. I bought a set directly from MSDS which took about 6 weeks to get. I paid a little more not group buying, but didn't have to wait as long. You may also purchase them at the SHOP Shop but they have a comflict since they make their own Y-pipe; the SHO Shop header is a MSDS set without the Y-pipe. Remember that MSDS will not offer their warranty unless you use their "supported" Y-pipe. There is a debate on which Y-pipe will give you the most performance. I choose to sell my SHO Shop Y-pipe since most of the performance is in the header not the Y-pipe. Also you should note that headers are intended for racing not street use. It gets rid of the two CATs in the exhaust manifolds and may not pass emissions, if your state tests. My does not. Go luck.
P.S. Depending on your tranny problems and cars age, you may want to upgrade your sifter cable endlinks. Check with Terry Haines at Haines Motorsports for further info, if you are interested.
