K&N RK-3947X Performance Air Intake System Review

After trying this intake system, my ride has never been smoother. The installation was a breeze and the results were noticeable right away. The increase in horsepower and acceleration gave my car the boost it needed. Plus, the superior filtration system ensures long-term engine health. However, the price may be a bit steep for some hesitant buyers. Overall, an excellent choice for automotive enthusiasts looking for improved performance.

It's huge but for what I need it's amazing, has a big difference in performance compared to my previous air filter (K&N replacement). It puts some strain on my leg but I'm on my feet now anyway so it's not a problem, looks good, nice finish and took about 10 minutes to install. I put it on a street rug in 2016 with a 110 kit.

I knew that this filter is thick and protrudes more than the regular one, but it is literally so big that it is difficult to drive with it. If you bought this intake system, there is a smart solution. Order K&N E-3986 replacement filters (available from Revain) and shorter spacers part no. 06500-1 at K&N. This replacement filter is twice as thin as the RK-3047, making the system very comfortable to drive.