Bigger cap value. If you check out the last few graphs you'll see the effect of gradually increasing the cap value. The ideal way to incorporate this is by putting it in front of an onboard buffer preamp. That gives you a constant known impedance (load) on the pickups and ensures your cutoff frequency stays the same no matter what you've got the guitar plugged into.
BTW, I'm no longer using a low cut cap in my 8 as I've wound tighter sounding pickups for it.