You can read the whole story of my wrong measurements and eventual solution on the DIY short ram
here.
But basically, you wanna get a short piece of tubing, I'd recommend
this and then buy a cone filter with the right size fitment, then you clamp that to your inlet pipe and you filter onto the alloy tube. Just don't do what I did and buy things that don't fit :lol: .
It doesn't really give any noticeable gains on power, but the throttle response is better, it purrs with normal driving and then roars with high rev action. It's worth doing. I actually plan to move mine into the space left behind after I removed the resonator. Make it a proper cold air intake.