Paul Bryant at Viking performance did the crossover, excellent workmanship and the sound is outstanding. I believe it was close to $400 shipped to my door but well worth the price. The performance that I picked up Also very much well worth the price! I’m still looking for someone on this site to send me a tune compatible with this but the standard touring de restriction tune seems to be working pretty good . I will be dynoing within the next couple weeks and will post my numbers.