[rms427]

I used a Fram PH16 for years on my 427. It's a short version of PH8A (equivalent to the ford FL 1A). The 427 and 289 used the same filter. I used several other filters over the years that were equivalent to the PH16. There was at least one that was supposed to be equivalent that didn't fit. I now am using K&N HP-2004. It's a little longer than the PH16 but it fits on my car. The advantage of the K&N is that it has a 1 inch (wrench size) nut on the bottom that makes it a bit easier to remove but it's 4.25 including the .25 inch nut on the bottom. The Fram PH16 is 3.69 inches tall and the FL 1A is 5.38 Inches tall. I just went into the garage and found several that I have on hand. STP16 appears to be the same size as the Fram. I also have a Purolator L14670 that is 4 inches tall. The same size as the K&N without the nut. You can get on line and cross reference to the PH16 and just look at the specifications and see how tall they are.