WIth your 90, you will need to modify the grille to fit it in. I am looking to fit a 2nd gen cooler in my 11/90 "91" but I also have the newer style grille and a shop full of cool tools and gadgets. Hit 38 psi tonight, fuel pin at 60%. Strong headwind, and cool air. TIme to intercool it and get hte pressures down, or will the intercooler do that?