What's the smallest oil cap?
 

In preparation for the Perrin oil cooler I recently ordered, I want to get the smallest diameter oil cap. Just from looking at pictures, even a few millimeters really does help clearance and I will need that since i'm using the TRD intake.

My 1st option/route would be the smallest oil cap. 2nd would be banjo fittings + longer hose. Last resort would be to sell the TRD intake.

Why not just use the stock one and if needed you can grind a little on the cap for that clearance. I don't think it would touch the actual sealing surface at all.

That's my plan to see if the few millimeters would even help at all. If it does then I would go ahead and try to find a permanent solution