Over the winter I installed a set of Euro 3 long tube headers on my 2005 QP.
I had to get header flanges made . Found a local company that does water jet cutting. I made up the collector's going from the header oval 3" outlet to 3" round and reduce them to 2.5" , I bought two 100 cell cats and installed them further back closer to the X pipe, all in S.S. I eliminated the secondary o2 sensor.
The hardest thing for me was making up the two pipes after the headers. I bought 4 2.5" 45s and 2 60s to make it work. I would figure out where to cut the bends and tack weld them in place then go to my friends house and he would weld them with s.s. wire. That's 7 trips to his house to weld each piece for one side only.
The car red lines so much easier without the two original 600 cell cats and short manifolds. It also sounds more like a F1 car now. Just waiting for the final tune from sammyf .
I had to get header flanges made . Found a local company that does water jet cutting. I made up the collector's going from the header oval 3" outlet to 3" round and reduce them to 2.5" , I bought two 100 cell cats and installed them further back closer to the X pipe, all in S.S. I eliminated the secondary o2 sensor.
The hardest thing for me was making up the two pipes after the headers. I bought 4 2.5" 45s and 2 60s to make it work. I would figure out where to cut the bends and tack weld them in place then go to my friends house and he would weld them with s.s. wire. That's 7 trips to his house to weld each piece for one side only.
The car red lines so much easier without the two original 600 cell cats and short manifolds. It also sounds more like a F1 car now. Just waiting for the final tune from sammyf .
