Im looking to buy a header and intake manifold for my 92 GSR but have found no real help. The car currently has only Thermal exhaust and AEM short ram intake. I will be adding a fuel pressure regulator shortly as well. Im looking at either a DC Sports 4-2-1 header or the JDM ITR 4-1 header. Ive heard the ITR header flows better and is better for top end, but lacks bottom end and mid range punch. At the same time I do not want to lose top end going with the DC. As for the Intake Manifold my choice is the Skunk 2 for the PR3 head. I was wondering if anyone has any experience or would know where to find dyno plots or people who have had similar setups. Sorry this is so long and thanks to anyone in advance who helps.
I have a 92 gsr too and I have both intake manifold and header. I have a JDM ITR intake manifold and DC sports header, they give me pretty good top end better it lack a lowend power but my brother say that probably came from a race cat.
You can use either an ITR intake manifold or a skunk2. Whichever you can find cheaper I would go with since the s2 is modeled after the ITR.
The 4-1 ITR header isn’t a direct bolt in which is something you need to research and decide if it’s worth it or not.