Used CX Racing intercooler. Good for 8 psi. I used this for five months. Bolt in install using mounting holes for tow hooks - no cutting, drilling, welding needed. Comes with longer bolts needed as the two hook ones are too short.

Uninstalled photo shamelessly stolen from Prospero's ad that I bought it from. (It's upside down in that photo.) There are a few more bent fins now from use. IIRC, I paid $100. Will sell for $70 shipped.