Hi RIch, great to hear from you. The part number is 33-5005 and is the same for diesel and gas engines. I verified on the K&N site, I pasted the link below. I got mine on Amazon for $68.29.
There seems to be a lot of unsolicited strong opinions about the K&N. I’m not an engineer so I don’t have qualified expertise, I’m just a regular guy who did some data oriented research to help boost performance a little to help towing. I don‘t go off someone’s opinions they heard somewhere, as Joe Friday said ... just the facts. The facts are it has proven horsepower and torque gains albeit minimal. To me it’s worth it to gain 5 more hp and torque. In short I‘m pretty sure the K&N does what it supposed to do otherwise they wouldn’t still be in business. If engines failed because of their product they’d be litigated right out of existence. I do have experience with the brand, I’ve run K&N filters on my vehicles, including ATVs, for years without incident.
At the end of the day, it is an air filter ... that does filter particles to some degree. It stands to reason less restriction lets the engine breathe easier. The same logic applies to HVAC filters. You can get filters that catch particles down to the wee tiniest of microns. Talk to a HVAC guy and they’ll tell you that type of filter smothers and kills the system, use a simple filter but make sure you change them at regular intervals. I clean my filter at regular intervals just like all other required maintenance.
I also pasted a video link to YouTube where a test is done using oil analysis. If the filter doesn’t do its job the end result is the particles end up in the oil. This guy does a great job explaining it.
Good luck
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