of making my own plates and and tracking down a proper sized plug for the manifold. Another concern I have is being able to remove the plenum pipes because they stick into the plenum a bit and I don't know how much clearance I have. It was a nightmare squeezing the hks2530s in withthe .86 exhaust housing. I have to grind a little away from the area where the trans and engine mount to get it to clear and the engine bay is still stuffed frame rail to frame rail.