The RCM and the k&n were of equivalent weight and substance when i cut them open to inspect. The threads are substantial on both, more robust than others ive used, some have 5 or so threads and some ive used were thinner threads. The thread pitch matters i think 18.5-1 and the antidrainback matters. Ive never had an issue with any filters ive used on the rocket but the RCM was basically designed for a 2 litre engine similar to ours and its a Performance filter and thats what you asked about, i think all are probably just fine for a 3k change.